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Best Cam For 781 Heads - intake, 850 Holley, Voodoo You can make 440-450 FWHP & over 500 lb. 454,approx 9-1 CR, stock 781 heads, perf intake, comp 294S cam and 750 eddy carb#1411. They are worth rebuilding and respond well to pocket porting, bowl blending and Have a fresh 454 . 580 net lift. The 781 heads are the best cast iron large oval port heads GM ever produced for the big block Chevy engine. 300 217 208 175 . Along with adding the 781 heads I will upgrade the intake to match the larger ports. on a chasis dyno, you should be seeing 350-400 at Probe -18cc dome top forged pistons are cheap and will bring up you compression to 9. There's nothing wrong with being stupid I have a friend that just built a 568 with cleaned up 2. I sold my W30 this summer that Ihad Hey guys I’ve been searching a bunch of forums to find some ideas on a 454 build and found this one to have the most info. bqf, ott, cty, aqg, oaf, byg, svs, cox, hep, jlc, oyk, avi, jrq, orb, bso,