What year did 318 motor mounts change?

kdeboy said

Several reasons. I wanted the 45 extra cubes, I wanted to run the high swirl 302 heads, and I couldn't find a set of 273 pistons.

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You can run the "302 heads with the stock 273 pistons (2 bbl). Not sure if they'll work with the 4 bbl pop-ups though.I'm doing that right now.