heavy duty engine it is necessary to 7 start with an RPO L 78 engine which has 4 bolt main bearing 4 caps and oil cooler provisions in the cylinder case This engine is built ... same large port cylinder heads and inlet manifold as high performance 427 s The RPO L 78 was rated at 375 H P in production and parts for increased A performance are available from ... heavy duty parts list In 1970 the RPO L 78 engine was increased in displacement to 402 cu in by increasing the bore size to 4 l25 from 4 094 In addition the engine
jetting should be staggered left front 80 right front 76 left rear 76 and right rear 78 If richer or leaner mixture is desired jets can be selecte down n size The 800 CFM carburetor