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Re: more HP from LQ4
You can also keep the 317's and have them milled just slightly. It won't kill PTV clearance and you can still fit a hearty cam in there.
Fwiw, cam only (no longtubes) I was over 400crank hp. When I switched to SD, that increased even further. I've got some worked 317's and longtubes for this spring, and I should be well over 400 at the wheels through my 4l80e. You can hit 400 on 317's even if they are stock, it just takes more "supporting" mods.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING 
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