Re: 73 C10 big block frame mounts
The frame side brackets are the same for the SB and BB. Part numbers are the same for C/10's which is 464709 for the LH. and 464710 for the RH.
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1977 Chevrolet C/10 Silverado. Step-Side, Factory 454, TH400, 3.73 Posi 12 Bolt.
1975 Chevrolet El Camino. 350, TH400, 3.08 Posi 10 Bolt.
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