Roller lifters: Hyd or Mech?

[ultraflo]

I've been using a set of modified hyd rollers that I had Sherman Racing Products do for me... they rebuild the lifter to act essentially like a solid, while maintaing enough plunger travel to be considered legal for the NHRA stock classes. I have over 100 passes shifting at 7000 and crossing the 1320 around 7200-7300rpms with no problems. And I do not have to run back through the lash adjustments after every pass.... like I've noticed some who run a solid lifter cam do at the dragstrip. Let me know if you're interested then I can give you some more info on them... one of the upgrades, for example, is that they replaced the flimsy wire that retains the internals of the lifter with a real snap ring. They can either do a set you send them, or you can buy a set already done from them...