360 swap?

Thanks for the replies. I have the yoke from the motorhome. It is a long tailshaft slip yoke trans, not a bolt on yoke. I'll check if the splines are the same. The 340 keeps leaking water into the oil. We tried resealing the intake three times with two different intakes, no luck. It's .060" over and was overhauled by my son for his senior project back in 2005. We recently pulled the intake and found a wiped out cam and a few bent pushrods. We planned to put the vin on the lost and found page just in case someone might need it, but I think it is junk.

My guess is the 340 most likely only has a cracked head or bad head gasket, I would not junk it too fast.
Why not just use the tranny that is already in the car if bolting the 360 in with the correct flex plate for balance?