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Re: Is it true that .....
Longhorn, could you confirm this method? Do regular blocks have nothing and the high nickel has the 10 or 20 under the timing gear.
Also, how do you tell a forged crank?
Thanks,
s/t
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1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe. 
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