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Username Post: Big block gmc
wagonman100 
Site Ambassador
Posts: 15395

Loc: Baltimore, MD
Reg: 11-27-04
01-02-21 09:26 AM - Post#2811190    
    In response to dgstarr

Yes, that is the casting number for the Olds 350. The Olds valve covers do not look like Chevy ones and may make you think it is a big block. A picture of the engine would help or do a search for pictures of the Olds engine and see if it looks like the one in the truck and report back.
Jay
Friends don’t let friends drive Fords.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier

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