Let’s talk about the 8-1/4” diff

318willrun said

Actually.... the 440 didn't go away in '78. It hung around a while longer in RV's

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WITH blocks that had casting dates no later than 1978.
I'd like to see a 400 or 440 with a 1979 or 1980 casting date. I've heard of the RVs with the 440, I've pulled engines from RVs too.