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« on: August 17, 2025, 05:07:01 AM »
I would like to start gathering parts to up grade my 428 engine in a cobra replica. Little about the engine is bored 30 and running 10.5 compression. Cam spec HYD 310 cam lift 542 valve lift 270 Dur .221 050 Dur lobe center is 108.Heads are Survial FElony head matched port to a Edelbrock rpm manifold with a 750 Holley for carb. Stock adjustable rocker arms with new shaft and end stands. The bottom end is stock except the arp rod bolts was installed. Transmission is TKX and 3:31 rear gears. Dyno 473 horsepower and 501 toque.
My question if I up grade the rocker arms and cam would I gain more than 50 or more horsepower gain with these changes.
Paul