I am in the process of cleaning up the engine for my MC21 rebuild and i am going to put the rear head on the front as per the HRC kit.

My question is, which orientation does the new rear head sit on the barrel? Or does the stud shape make it only fit one way?

Also it seems that all the studs will be of ok length? How short are the two that are supposed to be replaced? Perhaps this barrel has had a rear head on it before?

When will the marketplace be open again? I would like to buy the 19509-NKD-980 hose as well.

Cheers lads.