I bought it

congrats

rear seal same as a 727
for clutch take a look at ram
for the moment I know they the best for it
side covert good rtv will do the job just right
pedal assembly is a direct replacement
as said ealier you can modified it to be the same as 340
you need to cut the Z bar end put 3/4 plate on the fork side
so it will disangage the clutch faster but if you go to long the
finger of the pressure will comme in contact with the clutch

it help alote in power shifting those old grandma