I built a stroked motor last week and I double checked my preload on this one. I used a regular of the shelf roller lifter from epw. My break in is almost done so I'll be testing the rev limit on that. Smaller Cam went in this engine to match the longer stroke and reduced rod ratio so I'm not shooting for high rpm, but I'd like to see 6600. I blueprinted this motor a bit on the tight side and balanced it very closely, so it should do well. I'll almost to SEMA (drove it down from Seattle) so I have plenty of miles on it. I took the coastal highway to minimize time spent at one rpm or gear. This is in my 05 ctsv with a mp112 supercharger, 9.4:1, Manley Stroker kit, trick flow dual springs, kelford Cam, headers, etc.