Re: Found gas inside air cleaner's base and on filter element???
I went through all the same things you are with my engine ,even munched the tranny a bit.
Extending the vents might help a bit. I found the 850 a bit of a dog on the street with this engine. I tried a few carbs and after way to much work got a 950hp to work the best on the street. A custom carb might save you some pain although I didn't have much luck with that either.
WARNING... an A/F guage can drive you insane. A handy tool yes,but it drove me to efi!
Enjoy the process. I learned a lot .
67 RS convertible
Mark Jones 496...690hp
Liberty modified TKO600
Holley HP EFI