yea, ive been doing this for 25+ years, though the majority has been spent building big blocks. in all my years i have never had this much BS with any friggin hydraulic lifters. they really dont make them like they use to. i have seen original 120,000 mile 318s with their original lifters still providing service and i cant get a set of summit lifters to last 50 miles. that is really pathetic. i have installed countless lifters and never had one go until now