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Pistons and Connecting Rods Information

 

Pistons, Connecting Rods 1964 - 1990

Identification

Pistons

High compression pistons will have a sharp angled notch cut into the piston crown. Low compression pistons have a round cut in their crown. Pistons with both are probably special (eg. '70 W-31 pistons).

Rods

Code   Year(s)     CID/Block Code      Notes
GM     1973        455/Fa
XC     1972        455/F               442
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