454cid
Sooper Pooper
I never bothered with the Nickel plated yokes. Apparently, they only work for short bit and the problem eventually comes back reading some forums. Plus, I think they spendy, IIRC. There's lot of other things folks have done to try to fix the issue. There's one guy that inserts a ball in there...
The nickel is very thin, and probably wears off.