I got an 89 lude S. I was want to do a motor swap, what engine can basically jus slide right in, or is it worth it to jus rebuild the motor i have and buy new carbs.??? any opinions would be appreciated.

Any B series will drop in. If its an 89, its not carbuerated, its fuel infected.

I am justy guessing that the How tos and Walk thrus forum would be for How to and Walk thrus, while the tech forums would be for asking questions about how to do things, justa guess though.