$500... your options are very limited. Save your money or get a loan and get a B18B (LS) engine. They are pretty strong engines, and generally can take more of a beating than a D series (B18B has 140hp stock). Also, They have a lot more power and torque than any stock D series engine. You can get the engine, tranny, ecu, axles, and pretty much all the other parts you will need to do the swap for about $1500 (if you want to keep A/C and P/S, if not, you can do the swap for closer to $1200)