I'd be surprised if they were not from the same factory as the 603's.

I have 270k miles on my engine and its as tight as any engine of that vintage can be. I'm still waiting for it to start buring oil.

__________________
1969 280SE
2027 Ram 1500
2026 Genesis GV70
2007 Tiara 3200
1988 Egg Harbor 37
1981 Boston Whaler 17