I think it's Great I wanted to do that to.After you put it on the Celica make sure you go to a PRO Transmission Specialist and tell him if he can tweek the gear ratio too.Cause a sequential trans, it's gears are not config the same as a manual trans.So manual is usually better cause it has a better gear ratio, just tweek the gears
after installing it.(<But do this only if your getting a regular sequential trans, if you get a racing one then don't worry about its gears are proably config to go well with it, but tell the tech to check the gears just incase.)