Page 1 of Small Block Chevrolet SR, SR Torquer, & Motown Cylinder Heads by World Products

chevy v8 s/r equipped with manley streetflo stainless steel valves pre 1987 accepts both perimeter and center bolt covers world s stock replacement small block chevrolet heads make it easy to rebuild engines economically features 7-bolt exhaust pattern for max versatility extra thick deck and walls flash world castings #043600 and #043610 are accepted by nhra as replacements for chevy 041 186 291 292 462 and 492 cylinder heads exclusive right castŪ technology assures optimum port accuracy universal end pads accept both early and late model accessories hardened steel exhaust seats compatible with today s unleaded gasolines extra thick decks and walls for improved reliability all heads come with screw-in rocker studs machined valve cover rails eliminate leaks here are the oem casting numbers that world s s/r small block heads replace world #043600 gm 333882 460703 462624 468642 3911032 3927186 3927187 3932141 3946813 3947041 3970126 3973414 3973493 3974387 3981598 3986339 3998920 3998991 3998993 3998997 14020516 14020517 14020556 14071114 and 14079261 world #043610 gm 3795896 3814482 3827185 3884520 3890462 3911032 3917290 3917291 3927186 3932441 3946813 3973370 and 3998993 requires drilling for steam holes technical specifications material high density cast iron valve seats integral intake hardened steel exhaust valve size 1.940 x 1.500 rocker arm studs 3/8 shank screw-in style with hex shoulder accessory flange stock locations 7-bolt universal pattern included in assembly manley street flo 1 models stainless steel 1-pc forged valves with swirl-polished heads ring and band valve seals valve springs manley 7° chrome moly retainers and keepers recommended installation items head gaskets fel-pro #1003 265-350 or equivalent pushrods oem can be used hardened not required spark plugs accepts 14mm-5/8 .460 reach tapered seat accel 274 or 276 ac-delco 43ts or 44ts champion 670 or 802 or equivalent intake gasket fel-pro #1204 or #1256 or equivalent exhaust gasket fel-pro #1404 or #1405 or equivalent small block chevrolet stock replacement cylinder heads part application description valve dimensions 043600 bare head street cast iron 1.94 x 1.50 11/32 043600-1 hydraulic street cast iron 1.94 x 1.50 11/32 043610 bare head street cast iron 1.94 x 1.50 11/32 043610-1 hydraulic street cast iron 1.94 x 1.50 11/32 small block chevrolet stock replacement 1987 up intake cylinder heads 043640 bare head street cast iron 1.94 x 1.50 11/32 043640-1 hydraulic street cast iron 1.94 x 1.50 11/32 043650 bare head street cast iron 1.94 x 1.50 11/32 043650-1 hydraulic street cast iron 1.94 x 1.50 11/32 small block chevrolet stock replacement 305 engines cylinder heads 042650 bare head street cast iron 1.94 x 1.50 11/32 042650-1 hydraulic street cast iron 1.94 x 1.50 11/32 042750 bare head street cast iron 1.94 x 1.50 11/32 042750-1 hydraulic street cast iron 1.94 x 1.50 11/32 1987 and later intake face spring specs 1.250 single 100 seat 1.250 single 100 seat 1.250 single 100 seat 1.250 single 100 seat 1.250 single 100 seat 1.250 single 100 seat max lift .560 .560 .560 .560 .560 .560 chamber 76cc 76cc 67cc 67cc 76cc 76cc 67cc 67cc 58cc 58cc 58cc 58cc cylinder heads rev 2/07 17

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