225 /6 at 250HP?

TO AJ.
You are correct. I'm trying to point out, that installing a V-8 has it's own challenges, and expenses. I would estimate the expense to be about equal. It is not as inexpensive, or easy as most seem to think, but it is a viable option.

An overdrive auto in an "A" body is not an easy swap. Lots of mods required. At this point, it seems like a GM 200-R4, is the best trans to use, but it is not a cheap conversion.
See here: Slant Six Forum, :: View topic - 200-4R Install into 68 turbo Dart