Quote:
Originally Posted by Paul Precht
The 915 small valve is a better head than the 516 for stock, in SS the Stg5 head is probably the best option.The 60s 383 AFB which is the same as the 426 Street Wedge can work in Stock but it's a bit too small for any real power in SS. I have tested 2 of them on my flow bench and they flowed 566 and 582, I'm guessing their original rating was 575, the 582 one with a large 65 Monaco air cleaner base flowed 598 CFM. The 440 would need a full cage in SS as a GTX or in GT. If you don't have a cage the 70-71 383 would be best for GT as it can fit GT/LA which is not typically a very populated class. The AVS can flow close to 650 with a good base and the 383 Holleys that I checked were 724 and 746 without putting a base on them, both have the same HP rating in SS with GT being a bit higher. None of these will go .8 under without great heads, big money, Pro trans etc. The 70 383 will go under the index in GT with good heads, intake and ideal cam.
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Good info. The car is legal to 10.0. It is minitubbed and narrowed; and I?m not changing that, so SS is really the only option.