It's not the pushrods it's the tips.I too use better pushrods on something with a ton of spring on it.My own street car with a little old 590 roller eats the tips like candy.It has weak old spings on stock 452 heads.I put these on their because I had them in stock.Yes, I agree 100% that nothig is a stright bolt on.But when I see a problem with a product as simple as pushrods on a non race motor that is not good.LET ME BACKUP(the tips on the pushrods are Junk)I have answered how it fix the problem for a ton of people with great luck.So everyone that has had a problem with this pushrods ,we are all dumb a$$es.Lenny