Timing issue

The rockers are noisy. I was trying to time it but I'm afraid of messing something up now cause there is a popping sound coming from the hot air intake I have installed on there. It pops in sync with every lope. Is this normal or adjust timing some more? stock rockers are supposed to be tightened all the way down? I didn't tighten all the way because I didn't want to hang a valve open.
Gt40p heads explore intake. Stock injectors rockers and pushrods with tfs1 camshaft

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