Most of the 440 source stuff is decent. The stroker windage tray is too deep for a Hemi oil pan, and the oil slinger I got, the crank hole was a bit too small. Needed to open the oil slinger hole slightly to get on the crank. If using a manual transmission, the crank pilot hole is a bit too small for the bushing. It would need to be finished to size, or just use a roller type pilot bushing that locates in the countersunk part where the torque converter would normally go.
Stealth heads should be cleaned and checked before using. Pretty much applies to almost every aftermarket head.
The most concerning issue I found, was one rod had the bearing tab machined slightly off towards the center of the rod, putting the bearing edge into the crank chamfer. Found when there was too little rod side clearance. This was an old kit that had the 4340 I-Beam Rods, like 15 years ago?
The 6010 400 low deck 500" stroker pistons (KB) had to have the pin holes deburred as burrs were keeping the oil ring support from sitting flush in the oil grove.