3 speed to Powerglide swap crossmember

[EARNHARDT#3]

I am swapping my Muncie sm318 for a Powerglide. I have everything to do the job out of a donor 1967 Biscayne as well as a new aftermarket tubular crossmember. I have a 250 6cyl. Every thread I find pertains to swapping in a TH350 not a PG. Imagine that...nobody seems to like the Powerglide but I do and that's not my question here. The bell housing mount crossmember looks to be a real pain to get out. I've measured and it looks like the Powerglide will fit with the original bell housing mount crossmember still in place. Is the Powerglide compact enough (compared to the TH350 or others) to fit with that crossmember in place? I'm inclined to do a test fit to see but if I could get some information beforehand I'd appreciate if. Thanks guys.