It looks like I will be using the 20/21 grind when I do my top end rebuild and I believe I will be able to upgrade to the earlier exhaust system. I'm very excited, but I also do not know how this will affect my engine performance, other than a general expectation that horsepower will go up a bit. I liek horsepower as much as the next guy, but I also want to know how this might change the SHAPE of the power curve. I am hoping that horsepower will not fade away at 5000 or 5500 rpm like the stock motor does. It seems to me that these motors should produce power all the way to 600 rpm, at least. So, if anyone knows where to find some dyno results.......
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'83 SC
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