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The X-treame cams are ground for great low end torque profile, they are not designed for peak HP numbers so I wouldn't think the cam is the problem. I would check your A/F ratio and make sure your timming is right on. How do your plugs look? Also a .060 overbore is going to use more gas just because the pistons are bigger it's pumping in more air and fuel and its also heavier so more rotating mass. What cylinder heads are you using, stock or larger valve cylinder heads?
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1971 GMC K1500 SWB Fleetside, 4" skyjacker softride and, 14 Bolt FF, HD Dana 44 4.10's
1970 K5 TBI conversion lifted etc SOLD
1968 C20 camper truck SOLD
“To ban guns because criminals use them is to tell the innocent and law-abiding that their rights and liberties depend not on their own conduct, but on the conduct of the guilty and the lawless.” Jeff Snyder
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