kaiyson

I am about to buy a Subaru Brat, either a 78 or 79, but I don't have much of an idea on what to do with it. I plan on sanding down frame and body to try and get rid of any rust first, but I don't know whether or not I should keep the original engine, an EA71, or if I should do an engine and tranny swap. I plan on driving it on the road and in the desert, any suggestions?