I'm thinking of possibly trading my 65 Dodge dart GT blown 440 for a A body or b-body four-speed.

I know what you mean but I didn't use a motor plate. I use motor mounts and built build up from there. I have another motor in a shop that I'm waiting for him to get done. It's a stroker motor, probably 528 that I'm thinking about dropping in. It's got the right heads, stainless steel valve seats, etc. The right can for the blower and I'll be able to actually enjoy it if I want to put it together.