It's not that we have had a lot of problems, I just keep hearing & seeing problems with the tiny roller bearings & it appears Isky has done away with these bearings & put a bushing in their place claiming 350% better. I suspected that the push rods would need to be replaced, but I was not sure about anything else like block work etc, also if the bearings are not there they can't fall out & make a total mess of things.
thanks for your reply & advice,
Steve