Sadly, I'm nobody's idea of a guru. The A230 was factory for a whole bunch of Mopars, from slants to big blocks. I got mine from a 73-ish Duster with a 340. They are not unobtanium but you may have to keep your nose to the grindstone to find one.
I'll have to refer you to others that know this business better than myself for making this swap. But I do believe it's a pretty straight forward deal.