Could I use the whole 1995 rotating assembly in the 1975 block? Crank, rods, pistons, balanced and flexplate? I would just like to use the newer stuff if I can.

I wasn't aware the old 70s 318 two barrel heads were open chamber. I guess ya learn something new every day!

1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser

1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)