apparently it is possible to run the Auto tailshaft, but from what ive seen they are too long. had to shorten the one we used in unfamilias car by an inch or 2

H145 should handle the power if you drive normally, if you are doing burnouts and hard launches and stuff a h165 would be the go

you can use modified stanza crossmember mounts, the tower bits, on a 1200 crossmember to make the mounts easier
think a series 2 bluebird sump is supposed to be the best sump to use for the conversion as it sits closer to the engine. think its bluebird but not 100% sure

ive found that an under dash hydraulic clutch setup is the easiest and neatest way of doing the clutch, that way you only have to slightly modify the stock clutch pedal and make a mount for the master cylinder

i used a camry radiator, but its a little too wider for the 1200 so you have to do some panel beating to where the bumper mounts go to get the right clearance

bought all i can think of at the moment