Originally Posted by Fast355 For mileage and throttle response this would likely be even better but would run out of breath by 4,500. http://www.summitracing.com/parts/cc...make/chevrolet well I've been looking around more and I really like this one you suggested. How do I know if I need to have it ground on a small circle? And do I need different springs, pushrods or anything? Or will stock be ok? thanks.
-Frank 1987 GMC Suburban K2500 400SBC, TH400 Trans, 3.73 Gears 1995 GMC Suburban K2500 454BBC, 4L80E Trans, 3.73 Gears
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