Roller lifters have been in OEM applications since the late 80's. How much more OE life span can you get? I'm either going to put mechanical rollers in mine or figure out a way to mount the stock magnum spider and yokes in my LA block so I can use stock magnum lifters, or I may just build a stroker magnum, I haven't decided yet.
No roller lifters on a big block. Hence my comment on retrofits.
