I am building a 1986 K5. I dropped a 1980-1985 small block in it:

• Casting # 14010207
• 383 cubic inch displacement
• 2-bolt rear main
• Passenger-side dipstick
• 2-piece rear main seal

My new oil pan fits well, but I can't find a gasket since I have a thin front seal. The tech guys at fel-pro tell me no gasket exists for this application. I find it hard to believe that a sbc with any configuration can't be fit with the correct gasket. Fel-pro's 1881 rubber gasket fits perfectly except for the front seal. Fel-pro's OS 5197 C-2 (used for pre-1980 sbc) has a thin front seal, but the bolt holes don't match. I want to use a 1-piece rubber gasket, but will settle for what I can find. Has anyone run in to this problem? Can anyone recommend a gasket that will fit?

 

back in the day that probably never came as a one piece

Victor gaskets made a set called "tough cork"
Still a multi piece but the cork sides have a metal rib sandwiched in between layers of cork
I like a skim coat of Permatex #2 and a little dab where it transitions to rubber
If everything is clean for assembly you shouldnt have any seepage down the road

 

You're right. I can't find a rubber gasket so I went with an old-style 4-piece gasket. It fits good but will be a pain to clean up if I ever need to change it out.