Undy It's the same thing weather you run solids or hydros. Breakin of the cam is just the start. I know alot of guys don't remove the inner springs. IMO with todays
oil, the EOS additive and lucas
oil is manditory for any motor to survive the first 1,000 miles. I know guys that run 3-5000 miles with only the main springs in the motor and have very good luck. They also limit the rpm's to under 3,500. There are some old threads either here or on the FE forum that talk about Johnson who makes most the lifters. Someone was maken and selling cheap lifters with low rockwell hardening on the bottom surface. I think the other thing was the camshaft cores where crap too. With all the cutting of corners today, you have too really make sure about the
oil you are going to use in your motor. I get oil by the cases. Between the accusump and the motor, 12 quarts is needed. 1 bottle of EOS and 1 bottle of Lucas oil suppliment. Flat tappet are still used in some motors but on a whole either OHC motors or roller motors are here to stay. Rick L. Ps with the new stuff coming out and lighter valve trains, I am not sure why anyone would want to stay with flat tappet lifters. You can get an honest 15-30 hp different with just a camshaft change and lifters. The price of rollers has come way down from when they first hit the market. Engineers are working on lighter materials and raising the rpm and wider power bands. Next couple of years, an 8,000 rpm hydro roller motor will be running without any float of the valve train.