View single post by redracer
 Posted: 02-29-2020 02:43 pm
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Joined: 09-10-2012
Location: BROOKHAVEN, Georgia USA
Posts: 524
As I stated in the previous post, if there is a large oil drain hole(similar to the front drain hole) in your cam housing, that is from an earlier engine.
Many owners needed to have their housings replace due to lack of oil in the cam housing(mainly leaking from the cam covers--get the good replacement ones) and the earlier engines were more available and used, even though each of the 5 bearing surfaces were 0.001" smaller in diameter.
I don't know for sure, but the smaller may not have been a problem if better cam cover gaskets had been available, but the rear oil drain hole should be "plugged" if a newer style one is not available(don't ask me how to do it)