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Yikes ! Seems to me that One of those guys over on Rennlist used to have the Holbert speed record car, and that it had the stock cam profile, but altered cam timing. Mark Kibort, I think.
My 85 was owned by a friend of Al Holbert, and was one of the first 32 valve cars in the country. They altered the cam timing on mine as well, but I can't tell you what it is. Kibort will know, if he is still around. From what I understand, you can pick up 25 ponies on an 85/early86 just by replacing the exhaust with a free flow unit. Carl at 928 motorsports used to make one. You might have to get one custom bent today.
Seems like the later heads are also the ones to have, bigger valves. GT spec would be pretty nice, if you can pull that off.
I haven't thought about any of this for years. S4 heads, GT cams and a chip would really get you somewhere. You might want to look into cross drilling the crankshaft. Otherwise, stick to the current redline. A chip may raise the redline, but without altering the crank, you don't want to go there.
Nice project.
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