what I'd like to know is - Is it really worth the hassle to get cams and pistons for a GT?
NA cams & pistons - no
cams and pistons for a FI application - yes
why spend like 2-3 grand on a GT to make 160whp? you could just get a GTS
but if you plan on going FI then there is reason to do internals.
what do you think is gonna cost 2-3 grand???
cams, pistons, connecting rods ... thats at least 2 grand in parts, and most people, incuding myself are not about to tear down their engine in their driveways even if they knew how to do it.
therefore you pay a shop bank to do it, because its not easy, and it takes a hell of a long time to do... so about 1000- 1300 in shop fees will set you well over 3k to make 160 whp in a GT that now, cannot be turbocharged as effectively as a stock GT due to NA cams.