Is a T5 the same length as a M21 and do they need a different yoke?

I like the 308 in the Celica idea. I've got a Mk11 Corona Coupe with a Celica 5 speed and a blown 4M and was thinking something similar. Get a bell housing and whack a Holden bent 8 in instead. Cars got air, steer and LPG so it could be a nice comfy cruiser that won't cost the earth to run. It looks way cooler than that Celica too.