Re: Plans for a 478 build.
The cost of making a 478 (or any other GMC big block V6) make power at high revs will be much higher than making the same power at low revs by boost. I can certainly see the limited breathing of any of the V6 heads nullifying some, if not much of the gains made through headers, 4 bbl carbs and cams.
In addition, to make power at high revs will require tons of money to be spent on either making the heavy parts in the bottom end live, or be replaced with custom/aftermarket stuff. Aside from that, you'll still have to buy/source/make the headers and intake as well as pay for a custom ground cam.
Under no conditions would I try to make a 478 run at over 3600 RPM with the stock bottom end or valves, even in new condition.
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