THE SHOP

October '17

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8 PRECISION ENGINE OCTOBER 2017 PRECISION ENGINE DISTRIBUTOR Our MSD Pro Billet 85561 distributor was equipped with an adjustable-height slip collar and an iron gear. Because we're run- ning a steel roller cam, I swapped out the distributor gear with an MSD bronze gear for gear-to-gear compatibility. During distributor installed-height test- fitting (with gasket in place), I verified that the overlap engagement of the distributor's driven tang to the Melling oil pump's drive- shaft was approximately 1/4-inch, and that the distributor housing's oil groove aligned with the oil passage at the upper right of the block rear. This basically involved installing the distributor until it bottomed out, and then raising the distributor about 0.025 inches. I then cleaned the bronze gear and applied machinist's blue to the gear teeth, installed the distributor and rotated the crank and cam several times in order to obtain witness marks on the gear teeth. Upon inspection, the gear teeth mesh wit- ness marks verified a fairly centered contact area. The slip collar was tightened to the shaft housing to lock-in the height setting. After again cleaning the bronze gear, MSD gear lube was applied to the gear and the distributor was final-installed (with gasket). A CSR aluminum hold-down clamp was installed, secured with a 3/8- inch ARP stainless steel bull-nosed stud, washer and 12-point nut. SPARK PLUGS, WIRES & FIRING ORDER Our spark plugs of choice (recommended by Trick Flow for our heads) are NGK 4177, gapped at 0.050 inches. Installed torque is 10 foot-pounds (with copper anti-seize). I opted for a universal set of MSD 8.5mm plug wires that feature 90-degree spark plug boots, since I decided to route the wires along the bottom of the heads, climbing up behind the block to the distributor. The 90-degree plug ends tuck the wires inboard closer, as opposed to using longer multi- angle boots. The wires were arranged and separated using MSD wire dividers. While the block is based on Gen 1 small- block architecture, you need to remember that the camshaft follows the LS format firing order of 1-8-7-2-6-5-4-3, not the SBC firing order of 1-8-4-3-6-5-7-2. The dis- tributor rotates in a clockwise direction. Route the spark plug wires accordingly. Motown II LS Build Part 4 LS HYBRID PARTS LIST Engine block (Motown II LS) .......................................... World Products WP1084181-904 Custom valley plate kit ...........................................................World Products WP1703844 Pistons ......................................................................................... JE #311985 w/ .927: pins Crankshaft ......................................................................................Scat #4-350-4000-6000 Connecting rods .................................................................... Scat #2-350-6125-2100-QLS Crankshaft balancer ..............................................................................Fluidampr #720101 Main bearings ............................................................................... MAHLE Clevite MS909H Rod bearings .......................................................... MAHLE Clevite CB663HN/CB663HXN MLS head gaskets .................................... MAHLE Victor 54446; or Fel-Pro 1162R041 & 1162L041 Gasket set .................................................................................... MAHLE Victor FS1178VL Rear main seal (2 pc) ............................................................. Fel-Pro 2909 Chevy 400 seal Cam bearings ......................................................... Durabond GMP55 (grooved backside) Cylinder heads .....................................................................Trick Flow TFS-3061T001-C03 Rockers ............................................................... COMP Cams Ultra Gold ARC #19024-16 Camshaft .................................................. Erson roller P/N 54-462-11 (grind 293LR HR14) Lifters ........................................................................ Morel 5472, tie-bar hydraulic, 0.903" Pushrods ..................................................................................................... Trend TXXX805 (5/16", 0.080" wall, 7.500" length, chromoly) Timing set (for 0.134" raised cam) ......................................................Cloyes special order Front cover kit ................................................................................ COMP Cams #310 3-pc Oil pump .................................................................................................. Melling #10553ST Oil pump dowel pins at rear main cap .......................................................... 0.248 x 0.625" Oil pickup .....................................................................................................Moroso #24170 Oil pan ..........................................................................................................Moroso #20196 Oil dipstick kit .............................................................................................Moroso # 25973 Oil pan gasket ...................................................................Fel-Pro 1821 (w/thick front seal) Water pump ..............................................................................................Meziere # WP301 Remote thermostat housing ......................................................................Moroso # 63425 Coolant filler neck kit ..................................................................................Moroso # 63420 Thermostat housing mounting bracket ......................................................Moroso #63427 Radiator cap for water neck .......................................................................Moroso #63313 Block coolant hose ............................................................................ Fragola –12, #840012 90-degree –12 hose ends (3) ............................................................... Fragola #229012-BL Straight –12 hose ends (1) .................................................................. Fragola #220112-BL -12 straight/-12 37-deg fittings (2) ...................................................... Fragola #495109-BL Block coolant fittings (2) ................................................................... Aeroquip #FBM-2539 Intake manifold .............................................................................................Holley 300-132 Carburetor ................................................................................. Holley 850 cfm 0-76850RD Crankshaft bolt ............................................................................................ARP #234-2501 Cyl head stud kit ..................................................................................... ARP 7/16" & 5/16" Valley cover to block bolts ........................................1/4-20 x 7/8" stainless SHCS (Qty 4) Valley cover flat plate bolts ......................ARP #611-0515 (4 packs of 5…17 bolts needed) Oil pump stud kit .........................................................................................ARP #230-7004 Intake manifold bolts ..................................... ARP 760-1007 (2 packs); 760-1014 (1 pack) Carburetor studs ...........................................................................................ARP 400-2402 Oil pan stud kit ..............................................................................................ARP 434-1901 Fuel pump block-off plate bolts..............................ARP 611-0750 (1/4") ; 613-0750 (3/8") Fuel pump block-off plate .................................................................... Summit SUM-G242 Valve cover LS-to-SBC adapters ......................................................COMP Cams NG4011 Valve covers (SBC Gen 1) .................................................................. Summit SUM-G3302 Valve cover breathers ................................................................................Edelbrock 42133 Valve cover nuts (1/4-20) ...............................................................................ARP 401-8340 Block front and side expansion plugs ....................................................................... 1-5/8" Rear cam tunnel expansion plug ........................................................................... 2-11/32" Crankshaft keys ...........................................................................................Pioneer 839009 NPT 1/4" plugs ........................................ Qty 16 (front, rear, sides of block and lifter valley) NPT 1/2" plugs ............................................ Qty 2 (for front right upper and rear of block) Bellhousing dowels ....................................................................................Moroso # 37932 Block deck dowel sleeves .................................................................... Durabond # AD326 Oil filter base ............................................................................ Summit # SES-3-60-08-900 Oil filter ...................................................................................................... ACDelco PF1218 Distributor ........................................................................................................ MSD #85561 Spark plug wires .............................................................................................. MSD #31229 Ignition control ............................................................................................MSD 6AL #6425 Bronze distributor gear ..............................MSD #8471 (compatible with billet steel cam) Distributor hold-down clamp .............................................................................. CSR 670C Distributor stud ............................................................................................ARP #430-1701 Spark plugs ............................................................................... NGK 4177 (gapped 0.050") Water temp sender ........................................................................ Stewart-Warner 334P-D Water temp sender adapter LH head ...................................................... ICT Billet 551179 Water plug for RH head .................................... 12mm x 1.5 x 20mm bolt w/crush washer Exhaust port block-off plates (for transport) .................... Jones Racing Products EX-9101-LS Exhaust headers for dyno session ...................................................... Hooker 2292-3HKR

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