Originally Posted by Randy Nielsen (Post 3972326)

I built a stock 509ci engine using all stock parts except the valve train. I went to Bob Madera @ Marine kinetics who set me up with an entire valve train setup but pushrods. Springs, retainers, locks, roller rocker arms, hydraulic roller lifters, cam and he recommended an air gap manifold & 850 quick fuel carb. With a DUI distributor this engine made over 500 lbft of torque from 2800-5300rpm & with a 1" spacer under the carb it made 512hp@5300 but would wind to5600 using dynoroom headers. I am pretty impressed for having to buy new stuff I spentjust under 3G for a turn key stump puller that will live for many hrs. Randy