360 SB, 571 lift MP circle track solid cam. On mockup My p rods are ~1/4" too short & I am searching for options rather than spring for a set of new Smith bros items. Can I use hyd lifters (new of course) which I already have on hand and lock everything downward from the cup rock solid as the higher cup is gonna be about dead on perfect. Anyone see any flaws with that idea (plan!). thank you for your time. EDIT Cam is new and if I dont tube the galleries (pass one/block crossover to dr side) I would drill/tap/setscrew block the lifter oil feed hole to keep psi from hitting it from underneath