LS7 build 427 cubic inch Compression 11.5/1 Fully rebuilt Darton sleeves Forged crank Forged rods Forged pistons Johnson strapped lifters 7.850 pushrods BTR max effort stage 4 camshaft Cylinder heads rebuilt by American heritage performance , re ported and polished. New valves and stems Fast intake manifold 850 cc injectors ARP head bolts New everything inside. Chain Chain tensioner Cam gear Rocker arms are upgraded to CHE trunion bushings Dual valve springs with new intake and exhaust valves Converted to wet sump Only run time is dyno time at Westech performance group
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