I have some '61 Pre Unit T120 cases with 1969 one piece crank fitted.
I've acquired some 10 stud Morgo barrels and a matching 10 stud head which I was happily going to fit to my cases until I happened across the Morgo website which said a 9-stud set was needed for pre unit models.
I've dry fitted the barrels onto the cases and they fit fine but I've not tried it with pistons in.
I can't seem to find any info as to why I couldn't use the set up that I have.
Before I get to the point of putting it all together and then frustratingly find it doesn't work, can anyone shed light on why Morgo say I need a 9 stud kit rather than a 10 stud one? and will the 10 stud kit do the business?