I would do any rust repair that you plan on ever doing now. I say this because I have seen vehicles sit for a long time getting body work done, and it isn't nice on the mechanical aspects. Sitting and then lots of start/stop cycles take a toll. No way that I would do that to a new engine. It is even worse on the battery, of course.What project should go next? More Rust Repair, Engine, Brakes, Hoses and Bushings, suspension?