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350 Chevy World Products SR Torquer 67cc 2.02/1.60 Cylinder Head

New pair of assembled World Products S/R Torquer series Iron heads # 42660. Cylinder heads are for carbureted 1955 - 1986 small block 327, 350, 377, 383 or 400 engines. (377 & 400 applications for street would require steam holes to be drilled. We can drill the steam holes for an additional $30.00 for the pair. ) 67cc combustion chambers. ( These heads are also available in 76cc versions. Straight plug design. High flow 170cc intake runners. Hardened steel exhaust seats compatible with unleaded gasoline. Heads are adequate for engines with a projected horsepower in the 400 HP to 450 HP range. Integral cast valve guides. Universal end pads accept all early and late model accessories. Heads have both the perimeter and centerbolt holes for valve covers. These heads are assembled in our machine shop. Seat concentricy is checked. Assembled with PBM race series 1 piece EV-8 stainless 2.02 intake valves and 1.60 exhaust valves with chrome plated and undercut stems, swirl polished stem and hardened tips. New .600 max. lift 1.250 stock diameter valve springs with 110 # of seat pressure, new steel retainers, hardened locks, and umbrella valve seals. Screw in rocker arm studs (3/8") and guide plates are also included. All machine work is done in our own shop on quality equipment.

This product was added to our catalog on Thursday 14 October, 2010.
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