Rapid ticking???????????
how many miles did your motor have on it when you replaced the cam? IMO if its under 70k your lifters should be fine
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IMHO you have an exhaust leak.
Before I make my final decision though, is your oil pressure good (low pressure could be a lifter), and have you listened with the hood up (an injector ticking will be more apparent), and do you have hardened pushrods (stock pushrods like to bend, but I am sure you did that with your cam swap)?


