The engine it came with is a 235 -GMCpanel.
Regarding the awkward shift - I guess it comes down to what you're used to. I've always driven cars which shift with the left hand, so I have never noticed anything awkward about it.
OldSub - Thanks - I'll look into getting that catalog.
Question - what's the best place to order new rings from? Everything I order will have to be ordered from the States, nothing is available in Africa. I'll also have to have it delivered into a neighbouring country and then smuggle it into Zimbabwe. Customs officials are corrupt and usually impound anything coming into the country - from there I would have to "negotiate" the goods to be freed. So everyone is a smuggler. In a place when the Government is the biggest criminal of all, it tends to force the citizens to play their game.