If you’re having the rear main seal area cut down…

Make sure to have the machinist put the knurl back on the surface. And make sure the knurls are going the right direction.

Many aftermarket stroker cranks don’t have the knurl and most seep oil. The stroker cranks that some builders ask to be cut for knurl are much better improvement. SCAT can cut knurl on their cranks for an added fee. They don’t like to and resist it. Just be persistent.

Troy here just built a Hemi with Barton rotating assembly. Guess what? Rear seal area was knurled. And it doesn’t seep oil. The Eagle crank in Troy’s other hemi built 10 years ago leaked immediately. Then a rope seal helped. But not as good as the knurled Barton crank.