Reply to "your advices (finally) - 351C engine"

What PanterChris is suggesting in closing down the ports is very doable. It gets done with "plastic aluminum" or "plastic iron" Devcon epoxy.

You need to install studs in the ports to anchor the epoxy to the heads. Assuming that you would feel comfortable with the durability of that modification, first you need to know what the volume of your existing ports are.

You might want to consider a proven intake manifold first before you go through the expense and risk of durability first. Something like a Holley Track Dominator intake manifold MIGHT put you in that direction. It would be a compromise and likely not give you as much power as the smaller ports but you would not have to worry about the epoxy coming loose and the engine swallowing it?

You are going to have to make your own determination what camshaft you should use. It was my understanding that the cams that GP recommended were "street" cams? Of course you can race with any cam that you want. There is no requirement one way or the other, but if you are racing it really doesn't matter much how well the engine idles.

As far as carbs go, it's likely to be only a couple, either a Holley 4779 750 dp or a 4781 850 cfm dp or variants of them? I'd say on the track I suspect you might like the 850 better? Smaller carbs are mostly used by circle track racers who want more "response" coming out of the corners.

It's hard to tell you exactly since some of it is just how you like the feel of the throttle with different carbs AND cams. What you have is just a race cam. After all, it was built as a race engine. Kinda hard to drive that on the street and with a 7,000 rpm red line, it maybe be too much for the car. You have to try it. Race engines need to be tuned and getting the right camshaft is part of that.

If you got the right one first time out, that would be so surprising it would be actually shocking.

http://www.summitracing.com/pa...crn-361421/overview/