I picked up an older cylinder for my 03 spare engine build and had to do a small mod to make it work, so I figured I would share it:
The pre 03 is on the left and takes a much larger dowel
Made up a bunch of slugs to convert the hole size
The dowel slug in place:It can be used to fit the 03 + cylinder to the older cases or the older cylinder to the 03 + cases
The pre Hi- flo engines take a thicker base gasket so I need to establish if the 01 cylinder is a fuzz shorter or if the 03 just ran a slightly higher compression ratio... I will go with the thicker pre- 03 gasket regardless when I assemble the spare engine...