[BR3W CITY]

IMO even under 2k is ambitious if you want to do it right. I say this because even with some good luck in finding parts, and lots of re-usable stuff, you'll still have at least 2-3 unseen expenses. I have had 4 seperate times at which stuff has to be re-worked, changed, or in some cases bought to make it all work. Factor in cost of fluids, tuning, etc
If you just wanted to put a bone stock engine, reworked harness, use old trans, and just to a basic mailorder tune, i think 2k is doable but tight.