I’ve never had a problem with them Not even to 7000 in a race engine. KimWhat's the quality of the Sealed Power 4094M's. I've heard different opinions, good to bad.
You'll have to use whatever you can find. The low deck is being squeezed out of existence by the aftermarket. Pistons, rods, rings, bearings, etc. are all getting harder and harder to find. It is difficult to do a rebuild on one of these engines now. You can still build a race engine, but guys wanting a cheap rebuild are going to be out of luck before too long.What is the best main bearing available for a street/strip type 383 these days. I see the old go-to MS876P are out of stock everywhere, and the 1/2 groove disappeared long ago.