Should I get a 360 motor/tranny

I'd go grab the 360/tranny before it's gone. At least it's complete and if your in auto shop it'll make a great project! And if you cant afford to build it right now just put it aside for now.

I'd say the biggest issue you will face putting it in is if you have a 7 1/4 diff. That will need to go if you have one and you'll need at least an 81/4 or equivalent.