it's really up to you..if you think that the body is badly beaten..then i dont think that you'd want to spend soo much money swapping the motor...unless you're planning to work on the body too and plan on keeping the car for a long time...you have a few choices...i wouldn't go with the 3sfe though...try looking into 3sge's...it really depends on how much you're willing to spend...with the 3sgte..you're looking on spending atleast $3000 and up...and no you do not need a new tranny...but it wouldn't be a bad idea to get one...3sge's are usually now cheap..here in toronto..i can get one for as low as $200...and it's very good condition...or you can look into getting another 5sfe...that's if you're just planning to have the car as a daily driver and not planning on spending too much...it's really up to you..but there are plenty of choices...try searching here..or you can also check out www.celica.net for more info.