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After 1 season and had to repair 4 guides in 1 head(cannot remember how many in the other) because they decided to slide towards the valve head because they were not machined correctly,,are you kidding me!,that was not a parts failure, that was in the machining, you do not want to know what my present machinist/builder had to say about that mess that he ended up fixing,,



Are you sure that wasnt the fault of the low quality mopar performance head you used? They always seemed to have machining issues and bad metallugy from the get go..You dont need to remove valve guides to do most heads... unless you got them without guides in them.