so I have a sekine SHA

this one in fact :

things changed a bit in the last 6 months 27" alloy wheels and brand new tires, new bar tape, new seat

I have a alloy drivetrain wandering around in my tool box and the crankset is cotterless, while my sekine has got cottered cranks on it.

are they compatable (yeah im changing the bottom bracket if it is necessary) ???