Doesn't matter, B/BLK,S/BLK the lifters are the same size, there's .100 travel in the piston on the lifters. The only difference is if you have 3/8" studs or 7/16" studs. 3/8 1 turn equels .050, 7/16X20 equels 1 1/4 turns. Set it in the middle and go from there. But it really sounds like you have an oiling problem.
JMO
Zip.