Well, I just did some measuring with my trusty dial caliper and it looks like aprox. .005 of the lifter feed hole will be exposed at max lift. I imagine that will be enough to cause oil pressure loss with 16 lifters doing the same thing. I already have the lifters & proper length pushrods bought and paid for, so what's my most inexpensive option?? The old tube & peen method?? Thanks for all of the advise.