402 vs. 408
Mast ls7 heads 3k
Roller rockers 1k
Fast intake another 1k
Thats 10k there but thats the huge majority of whar you need thats expensive.
The Best V8 Stories One Small Block at Time
https://ls1tech.com/forums/forced-in...cam-4l80e.html
My car is making 500 H.P. with a mild cam. Most of the gain comes from the 4" Stroke. You can really feel the longer stroke compared to the stock stroke LS1 engine. Im running stock LS3 heads with Comp Cam Beehive valve springs & a comp cams 238/240 duration 6... inch lift cam, Chromemoly push rods.


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