the thrust bearing carrier is longer for the 60a apposed to the 56a so u need the 60a thrust bearing carrier

sandwich plate is the same, would i have to run a a12 flywheel on the smaller 56 series box?

You can also machine a new release bearing carrier with the necessary length.

not sure about the sandwich plate?
all i did was take the 60 series off and put the 56 on, so i should have taken the sandwich plate out?

my guess is that you are running the longer 60 series, release bearing carrier. they are approx 6mm longer than the 56 series carrier. Also is the engine sandwich plate between the engine and gearbox still installed?

just wondering if anyone can help me, ive just changed engines in my 1200 from a12 to a15 out of a sunny that had a 60 series gbox attatched and a heavy duty clutch, the clutch never slipped but now its in the 1200 and a 56 series gbox on it doesnt engage properly, i just changed the cable and it mad a slight difference? its got me stuffed, ive tried adjusting it but i cant get it any better
any help cheers