If you use the B310 5-speed (60 series), you will not need to beat out the 1200 tunnel. You just:

1. make a simple flat plate for the rear trans mount
2. Remove the backup switch from the trans
3. Use the right driveshaft

The A14/A15 mainly needs:

1. Swap the engine mounts side to side
2. Make a simple flat plate for one side to offset the mount
3. Maybe lengthen the exhaust pipe

Search the site for mounts plate, motor mounts, etc
See the 5-speed Tech Section articles

will be going through the same process soon...have been told the gearbox tunnel...needs a bit of a beating/massaging to fit it in...thats a celica gearbox ne ways...i'm not 2 cluey

Hey guys i bought a 71 1200 the other day and i know that a could drop in a a14 or 15 and a 5speed out of a 74-78 B210 but I dont know the exact proceedures ive been told that i have to make special motor mount brackets is that true? if so how? also will the 5speed fit in perfect with out cutting up the Car? thanks guys