[dragula81]

(I just realized that I should have posted this here.......)
Hello,
New user here. From what I've read around this site for the past couple of days, I'm sure I'm going to catch some crap for my subject line on this post but anyway here goes:
I just bought an '81 Nascar Edition Turbo T/A with a bad engine (301 of course). Sitting in my garage right now is a perfect 350 Chevy that I just pulled out of my '70 Nova that I built last summer. I want to eventually put a 400 or 455 in the T/A, but it will take me several months to afford to build one up. So, I would like to go ahead and install the 350 in it until I can complete the 400 or 455.
Can anyone help me with what this will require? I know I'll need to swap motor mounts, but what about headers/manifolds, PS/ALT/AC brackets, electrical, PCM problems, etc???? What transmission will I need to use? I have a short tail TH350 now - will it work with the T/A driveshaft and crossmember???
I know this is a common swap because I have seen several on Ebay like this but I'm not sure what it will encompass for me to make this swap.
I don't want to alter anything that I couldn't easily return to original since I will eventually be installing a Pontiac motor back in it.
Thanks for the help!!
Dragula