Thread: 402 BBC buildup - combos???

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Originally Posted by 69elko

Don't go the rectangles unless you plan on getting some massive HP and RPM's out of it. If you want aftermarket heads I'd go for the Brodix aluminum oval ports. They are a 270cc intake runner, so they are perfect for a smallish big block chevy. I'd get them with the 2.19 intake valves NOT the 2.25's. The Edelbrock performer RPM heads are another option, 290cc oval port, a little on the big side but have a smaller 110cc chamber so they will be better for compression. I'd shoot for around 9-9.5 to 1. What kind of heads do you have right now? What #'s on the heads?

I was breifly looking at the AFR's just to throw it out there. and they said they pick up good at 2500rpm and said they arent too big for a 396 to perform. i'll be spinning it at least 5500.
i have a set of 336781's at the moment, open chamber, 113 cc heads. Ii bowl blended them and gasket matched them. since they are originally for a 454. I'm thinking they are too big. After the port work I did, i had them flowed and they are too close to eachother, they are 95%. so if I keep those heads, i plan on cutting the intake to a 2.19 to make them 75%
Im considering aftermarket heads. but im willing to go with stock as well. I wanna peak my torque at roughly 3600 RPM and peak the horsepower at 5000 RPM.
im shootn for 425 hp and roughly 500 ft lb torque.
any help would be appreciated. Thanks!