Soko sells used motors for bout 750 last time i checked there in chicago, Il. There suppose to be low mileage jdm motors but im not for sure cause ive never got one but u buy one of them and then build the shit out of and you'll be set.
Yeah, SOKO is not bad. They sent me the wrong year of motor for my car and I think it was a cressida since I had to change oil pans, but all in all, it was fair condition and I would recommend them and their good prices
Jasper Engines and Transmissions sells remanufactured short and longblocks which are just as good as new. I got my longblock from them last summer ('04) and so far it's holding up strong. I paid about 3200 for the longblock. If you have a core, you can get cashback for that too.