Stall?

Back in the day, we used to go to the junk yard and get a power glide converter from a Vega and put it behind a 350 V-8. $15.00. The equivalent, today, would be like using a converter from a 4cyl K-car (don't think it would fit). We would go thru about 5 per season.
Those that know me, know I'm a cheap SOB, Hell, I spray over 175 HP on stock slant six pistons, but I would not ever consider a "off the shelf converter".
I've said my piece, the OP can make his decision.