PBM/Morels. Crowers, Isky Redzone, they're all tough decisions. I personally like Crowers hipro, that is what i have installed in my new 434" motor. I have a set of Isky Redzones i could have used but they are not offset which i needed. I've used Crower a long time and have had very good luck with them, even before the Hipro with the oiling hole. There is something i've done for over 20 yrs.. It's no secret to a lot of people, it's something that been around for a number of yrs. but not talked about by the professional builders. Howard just introduced it on their solid lifter as a break thru, lifter/cam saver. They must have saw some of the lifters that i modified, or some one else with knowledge. On the top side of the roller lifter i grind a 1/16" wide flat from top to bottom of the lifter OD. that's about .003 depth on the OD. It oils the lifter bores and the rollers at the same time. I would not have posted this except Howards, placed an add in National Dragster, BOMBSHELL, BOMSHELL, break thru to make your cam and lifters survive with todays oil. If anyone doubts what i have just posted i have a set of used BBC lifters out in the shop with 150 passes on them and they look brand new and i can and will take and post pictures of them, the lifter od's look like they haven't been run and the rollers have no wear at all, neither does the cam, although only .730 lift which i can also take pics. of., with 275 lbs spring pressure at the seat and 800 lbs. open. With that said i have available to me in our shop a hole popper EDM which i could put the oiling hole in any set of lifters, but in my opinion the ground flat works just as good and oils the lifter bores. I don't have any experience with oversized and bushed lifter bores, only std size .842 bores. I know that the larger rollers are better, but the engines i build are for people on a low budget, including myself.
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