It's pretty clean, I kept it pretty tight. Maybe why it's so hard to track this leak down. It's not a real small leak either. Vacuum is still low, around 12. It's all over the oil pan, Trans pan and starter. Flywheel must be throwing it on everything too.
I can run my hand on the China wall, and back of valve covers, and it's dry.
I sure don't want to have to change that rear seal.
It doesn't take much crankcase pressure piston ring Blowby to cause an oil leak.
Be sure to check the PCV Valve.
Fram parts store brand is Ok
They all have different flow calibration rates for different engines .
It's been covered here in the archives.
Look one up for a 1978 Chevy Z28 Camaro be a good one to start with.
If no PCV consider adding one.
I use one in the 76 Pontiac 455, that mounts in the pushrod cover on mine.
Like Factory Air gap style intake.
Mopar 440 did it same way.
PCV valve is important on a Street engine.
Full Race engine you have only 3-4 inches of Vacuum at idle.
Need different methods of crankcase ventilation used then.
Rear main seal leaking on a Pontiac V8 you must pull the engine out the car.
Nightmare
Been there in past.
Other 455s I had.
Used a Best Grapgite Pontiac V8 455 rear main rope seal. Perfect seal no leaks !
CHEVY USE A FEL PRO REAR MAIN SEAL.
