I like how your wife thinks
I had a 440 and auto for my car and then decided that it would be easier to put ps on a SB car and it would drive better than the BB.
So I built my 340 instead of the 440....................WHAT A DAMN MISTAKE............excuse the caps. The 440 would have had better power and easier to do. And if I didn't mind throwing away all the stuff I have already done I would put tube front end, coil overs, R&P and either a new hemi or a BB. But I did this starting in the mid 90's and there wasn't as much in aftermarket parts for A bodies then
If you want a reliable race car I would suggest the BB. If you are building a street strip car and want a better driver maybe a SB.
My 2 Cents