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Re: 496 to be DYNO'D!
Holley 12-454-? 170gph. I dunno if Mark got the cam from cstraub. He has been using this cam in this motor for quite a while... He told me a couple months back that the identical engine to mine with more refining is making upwards of 725 now... Mark is always trying to make better power, and is obviously very successful!
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82 GMC High Sierra
VortecPro 496
12 Bolt, 3.42's
AFR 265
Holley 850
Performer RPM Air Gap
Hooker 2455's
TCI Turbo 400 Super Street Fighter
TRRC 12 Bolt
Eaton Posi
Mark Williams Axles
Cal-Tracs
Hoosier 30x10.5 Radial Slick
Full weight long box pickup
Current best- 11.33@117mph
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