The 2t/2tg engine is the easiest swap! Ive done this conversion with a 2t into a ke30 twice. You use the celica mounts and they bolt straight up to the corolla cross member. I used the celica 5 speed with the cross member and just drilled new holes in the g/box cross member that matched up with a set of bolt holes in the chassis. I am pretty sure the tailshaft is a (ke16 or 10) wagon tailshaft with celica/corolla uni joints. The hardest part is probably changing to a hydraulic clutch but there are spare bolts in the firewall that can be used with a bit of mucking around with the pedals.
I was running extractors and two inch exhaust and it surprised quite a few people. I have since blown the engine . But have now recond an engine and bought a manifold, to4 turb and weber to fit so once i get back into the shed i will have to put this package together for some fun!!! Hope I could be of some help! if you need any more info just email me and I will try and get it for u.