72 Chey - temporary engine swap (need advise)

[Model 12]

My 72 350/175 TH350 is tired. VERY tired. I pulled my boat about 30 miles down I-40 near Knoxville and it was all it could do to make it to my destination. It's tired!

A friend has a 87 Chev 1/2 ton 305 truck (80k miles) that just got T-boned. I am considering buying the engine on the cheap and sticking it in the Chey, then rebuilding the orig 350 this winter, then sell the 305.

I had considered buying a crate motor, but that's going to be 1500 gibs minimum, and I still want to use the orig motor, rather than having it cluttering up the garage (unless it is just too worn).

The general plan is to use just the 305 long block mated to my intake, Q-Jet, fuel pump, distributor, ram horns, AC, PS pump and flexplate. Am I missing something? Are there some unknown issues about compatibility? Thoughts?

Thanks, Dave