my guess is it'll be a squeeze with the cylinder head in-between the frame, and if it does go in their won't be any side to side movement if the output sprocket needs moving. also will the carbs fit in ? only a guess though ??????
the oil cooled motor is my favourite engine but are 10 a penny and you could get one anytime, the EFE engine though is getting almost impossible to fine so strike while you can.
as wraith says the carb rubbers are different but both sets are interchangeable, mk1 rubbers with mk1 carbs, mk2 rubbers with mk2 carbs. also the mk2 has the speedo sensor on the output shaft if you want to use an electronic speedo.
when i did fitted katana bodywork to my inazuma frame i had to make up the rear frame to fit the tail unit and seat lock. wasn't hard and doesn't need to be factory spec.
yeah im pretty sure the swingarm will fit at the pivot point, a 1200 bandit one fits in a 750 ET frame. did the bike come with the ET tank allready fitted ?
your clutch plates are stuck together, fire the bike up and push it then jump on, with the clutch lever pulled in put it in gear. then just get on and of the throttle lightly till they break loose, keep the lever pulled in though.