I’m in the same boat as the OP, I have thought of doing the switch many times, but the cost has held me back. It would be going behind a big block, which makes it a little more expensive, since I can’t find a big block 833 out of an A body anywhere!
There is no difference in a A body 67-69 4 speed. They are the same small block or big block. Only difference would be if it were 440 or Hemi, 18 spline input shaft and gears.
