I just noticed where the breather tube is supposed to exit the differential is just a hole. I'm guessing it's supposed to have a barbed nipple like the front but it's sheared off. Is this a pressed fitting or screwed in? Can't seem to find it anywhere online.
Thanks guys. I think I'll pop a couple 3/8 holes inside and try out the foam. Headliner will cover them up so it will be the least amount of work. I'll let you know how it turns out.
I'm doing some body work on my 84 k20. It came with a pretty significant bird bath on the roof. I welded a stud on and pulled the dent, but the metal pops back in with very little effort. There's no way I'll be able to block sand it properly without it popping back in. I'm wondering if there is...