So Its finally about time to put my motor back into the car and Before I put it back i was thinking about building a custom rotated mount up pipe and downpipe. I wanted to convert it over to an evo flange so i can run a big 16g turbo (just for now because i can get a brand new one for 200$) then move up to a gt30 later on when the money is present. My question is should i just wait untill later on to go rotated and would the oil lines and all that stuff be a hassle to convert over to mitsu?

You'll have a hard time with flanges on a Mitsu turbo and then a Garrett one. Do it all at once when you know what turbo and exhaust housing you're going to use for the long run.