Page 4 of Small Block Chevrolet SR, SR Torquer, & Motown Cylinder Heads by World Products

motown motown leak-free fully machined valve cover rails accepts both perimeter and center bolt covers high-flowing cast iron cylinder head for small block chevy engines that s perfect for big-inch motors screw-in rocker arm studs available with either straight or angled spark plug holes technical specifications material high density cast iron valve seats integral intake hardened steel exhaust valve guides integral cast iron valve spring seats machined for 1.250/1.550 springs stepped valve size 2.080 x 1.600 rocker arm studs screw-in style with hex 7/16 shoulder furnished with assembly accessory flange stock locations 7-bolt universal pattern included in assembly manley racemaster 2 models or severe duty 3 models 1-pc forged stainless steel valves with swirl-polished heads ring band 2 models or pc 3 models style seals 1.440 2 models or 1.550 3 models valve springs manley 7° 2 models or 10° 3 models chrome moly retainers keepers and pushrod guide plates recommended installation items head gaskets fel-pro #1003 265-350 #1004 400 or equivalent pushrods requires heat-treated pushrods use of 1.6 ratio rocker arms requires elongation of pushrod holes spark plugs accepts 14mm .460 reach tapered seat 5/8 hex champion #670 or #802 or equivalent intake gasket fel-pro #1205 or equivalent exhaust gasket fel-pro #1404 or equivalent machine shop specifications maximum valve diameter 2.125 x 1.600 or 2.100 x 1.625 maximum spring seat depth from inside step .030 maximum spring diameter 1.550 approximate milling guideline varies with depth .0065 per cc maximum flat mill depth up to intake seats .040 maximum angle mill approx 50-52cc volume .175 depth note these specifications are for reference only always measure before machining universal end pads accept all early and late model accessories designed to provide an even greater intake charge than the sportsman ii world s motown 220 clearly rates as the ultimate small block cast iron head it features the latest high tech 64cc chambers and right castŪ 220cc runners to provide a combination of excellent flow and high velocity with high-flow ports and standard intake valves motown 220 heads are the ideal compliment to large displacement small blocks 383 c.i.d and larger available bare or in complete assemblies with your choice of straight or angle plug configurations race-proven 64cc fast burn combustion chambers are exceptionally efficient 220cc right castŪ intake runners can support 500 hp small block chevrolet 220cc intake motown cast iron cylinder heads part 014150 014150-2 014150-3 014250 014250-2 014250-3 description motown cast iron motown cast iron motown cast iron motown cast iron motown cast iron motown cast iron cam type bare solid/hyd roller mech roller bare solid/hyd roller mech roller valve none manley race master manley severe duty none manley race master manley severe duty plug angle angle angle straight straight straight spring specs none 1.437 dual 125 seat 1.550 dual 200 seat none 1.437 dual 125 seat 1.550 dual 200 seat max lift chamber 64cc .600 64cc .700 64cc 64cc .600 64cc .700 64cc 20 rev 2/07 cylinder heads

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