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I have a 92 gt I have a stock pair oh heads for it that I'm planning on doing a value job and porting and its getting a cam and such does any one know how big the values can be and how big of a lift for the can to go thanks
They work ok with the stock cam, but you won't gain anything with a bigger cam unless you have a lot of work done to them, which isn't cost effective with all of the aftermarket heads available.
The heads are the only item in the 3 that I would change by itself. Swapping the intake, TB, and MAF first does help but not much. Better throttle response.....