Who has knowledge on R series motors? Mainly 5R and 22R (&E).

[Javal]

Hi.

Early R motors have an integral bellhousing (as in, part of the bellhousing is actually part of the block casting), thus gearboxes, clutch assemblies and pretty much everything else is non interchangable between the early OHV R motors and the later OHC (and DOHC) R motors.

Have fun.

Tractor motors ftw.