@39master85 On the old Chat site you may find more information including adding a groove to the rear bearing to allow the oil to more easily return to the pan. The older chevys are known for "marking" their spot and in fact some owners claim that if it does not leak it is because it is out of oil!!.

@39master85 Welcome to the VCCA Deric. This should be a stand alone thread rather than a piggyback. I'll give it a day or so for you to see this reply then I'll split your post off into it's own thread.

@tiny - appreciate the welcome and I have seen the reply. I pick the car up next Monday so excited to see the motor back in it.

Any rear main bearing gap over 0.002" is likely to drip or seep a little oil. Just enough to be a visual problem but not even close to excessive oil use. If over 0.003" it will leave a spot whenever parked. The bigger the spot the more over that gap. Of course that assumes that the passage back to the oil pan is clear flowing. Like many older folks a "Depends" either onboard or on the ground can help.

@chip - you’re spot on. The lead mechanic took just a half a thousandth out of the shim set and it sealed right up. He put it right around 0.0015 now and after driving 20mi and putting her back in the garage there isn’t a drop to be found.

@39master85 I'm happy you got it solved. I notice your lower accessory horn brace is missing. It would be fairly easy to fab one if you want to add it back. Oddly, the best picture I have of mine is an "as found" picture when I was looking at the car in the barn before rescuing it.

I think I posted the "specs" on making that bracket in the old forum many years ago. I probably also have some good photos. Will take a look and get back.