umm if u want a 5spd and 300whp then go with the sr20det swap... with the swap comes a 5spd transmission inwhich you can do the auto==> manual swap
afterdark tuning also does the swap for u when u have the S13 installation package thats where i think i will probably do mine its a good deal and they seem to be a trustworthy company, new but trusty. so save up for the SR20DET