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Re: Is it true that .....
I definitely seen some numbers under my timing gear, but not positive on what they were. Do regular blocks have nothing? I can pull the time sprocket back off if need be.
Bill, if you don’t mind posting the picture that would be great.
And what is the silver plug for? I seem to remember a hole in mine.
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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