I built a 383 for my 3600 from a 1991 350 TBI and it runs well, pulls strong, etc. and it has about 400 miles on it so far. The block was machined 0.030 oversize and honed by a machine shop that I trust but don't have any personal experience with.
The problem is that when driving to car shows and similar when I arrive and putter around the parking area to get to my parking space it smokes noticably, I believe from both exhaust sides (independent dual exhaust). Oil is 5W30 and it used about a quart in between the first oil change (roughly 100 miles) and the next 200 miles. Typical drive to the shows is 40-45 miles, mostly at 55-60 mph with no noticable smoke when driving or initial operation in town after highway driving at 25-30 mph. Engine speed at 60 mph is approx 2200 rpm.
I suspect that I don't have the rings/bores suitably broken in but wondering about all sorts of other potential issues. I have tried to do high load pulls like 4th gear from 30 to 60 mph (roughly 3000 rpm) to help seat the rings but I'm not sure that is working.
It has been a few years since the engine was assembled and I am now questioning what I did for valve stem seals (memory is a terrible thing to loose).
My PCV system has the valve mounted in the passenger side valve cover connected to the base of the carburetor - connected to the intake manifold vacuum with the "clean air" supplied from the clean air side of the air filter to the driver's side valve cover. I don't recall what variation of PCV valve I have.
Any advice about what to investigate or was to get the rings seated would be appreciated.
If this should be in the engine forum please feel free to move but as a non-standard engine I assumed it should go in the HP forum.
