then what is the most suitable engine for the ta23?
easiest is to use 3t-gte or any of the t-series engines but over here in malaysia, sourcing parts require quite an effort if u dont know the right people.
if u want simple transplant, moderate power, easy work, wont take so much time to complete, choose 4AGE 16 valve from toyota ae86.
if u want to go really fast, lots of power but as a result u have to go some extra lengths to keep everything reliable, safe n controllable, choose 1jz-gte from toyota supra.
if u like to cruise on highways, like smooth power delivery with lots of torque that are not explosive, choose 1uz-fe from lexus ls400. this one auto only. can be changed to manual but very very expensive.
it all depends on ur driving style, what u intend to achieve from ur car, ur budget, ur commitment n patience, n in some cases, what ur parents/girlfriend/wife permits u to have...
all of the options above have already been done n proven to satisfy the owners' tastebuds. if ur really really serious on doing up ur car, check this out http://drift.com.my/forum/viewtopic.php?t=22352 and send private message to the thread starter. he's extremely knowledgeable on toyota TA2x cars n personally rebuilt a few TA2x already. check out toymods forums as well n check out members' rides section. there are lots of TA23s running all sorts of engines. some even converted to GTR 4wd drivetrains...