Need info on full roller rockers..
I just got my rockers.They are 3/8 1.5 ratio full rollers.The stockers on the engine is 3/8 1.5 ratio.keep in mind the engine is basicly stock.Called Blairs Speed Shop.The counterperson claims I would need guide plates and stud griddle even though I'm on a stock cam/valvetrain.Stated he would have to pull the heads to restud them.I could understand this if I was putting in a big cam or if this were a high reving engine..If the full rollers are 3/8 stud and my stockers are 3/8.Why would he have to restud them?I wanted the benifits of running full rollers.Trying to make all the power I can and still pass Calif smog.EXP builders please chime in.