If you reused the original
oil pump it is 99% chance high volume. I assume you have a hydraulic roller cam. Unless the cam is defective which would have shown up before this rebuild how can it be worn? Is there spalling? Deformation? Who is making the statement did you see it? Than again if a lifter failed and tore it up that is different. When u check
oil make sure you check it after it drains for 12 hours especially with heavier
oil! You would be surprised how long it takes to drain. MAke sure you check your dipstick calibration. When u drain the oil assuming roush provided oil pan it takes overnight before the oil will weep past the baffles and make it to the drain plug. The baffle doors are one way. I drained mine got 6 quartz, jacked front up and next morning was another 1.5 quartz in pan. If roush pan it holds 8 quartz. Every dip stick. Checked was off 1 to 2 quartz!
Once again unless you modified pan if you just pull plug let it drain for 15 minutes and refill you can easily overfill. Don't ask how I know all this bull sheet.
Leave no stone un turned. Checks take minutes!!