truckernix adds good info, "I have found the cork gaskets that came with my sets have always been too thick and thus very difficult to use. I use the rubber ones when they are available."
Yeah, wish I could remember which is which. This is one of those "I know it when I see it" things. Shoot, I might even be confusing this with small block Chevy V-8 engines, same issue for those. I have built so many of those engines, six and V-8, I have a hard time remember which is what.
Frustrating becoming a senior citizen, you lose some of your self-confidence about your memory. Annoying to dress in the morning, stand and walk only to fall flat on your face because you tied both sets of boot laces together.
This is why I always wear my cowboy boots, only challenge is remembering right from left, not sure at my age I would notice even if I did mix 'em up.
I just know there is a year difference in oil pans. Funny, I can remember this better than I remember where I live. Thank goodness my old lady knows to go out and look for me when I am gone for too long.
As long as Kip carefully test fits his oil pan, he will be OK.
Billyray