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Re: Big block 400 in 70 GMC Sierra Grande?
2Tons, did you measure the bore? Is it possible that it was a replacement engine which someone else put in it?
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69 c-10 BBC 
462ci, forged crank, H-beam rods, 10.5-1 KB forged pistons, Dart Iron Eagle 308cc, Straub Cam, Comp Cams chrome moly full rollers, Weiand Team G, Prosystems 950, TH400/3500 Dalenzie stall, Currie 9+ Detroit Locker w/31spline axles.  3.5/6in drop. My Build.
Last edited by ripdog28; 12-25-2009 at 10:47 AM.
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