headers are ok. i dont see that much in gains with them tho.
i would say an intake would give you a noticeable amount. plus matching those with headers would give some good flow.
where do you live?
what are your options for exhaust?
removing the cat and throwing some high flowing mufflers would help out alot.
96 short box regular cab
323, xtreme energy 264 comp cam, hydraulic roller lifters, 1.6 roller rockers, ARP studs, comp magnum push rods, electric fans, 42lb cobra injectors, MSD 6-BTM, MSD blaster SS coil, machined heads, 2300 stall, DIY TB, mopar air gap intake, custom made headers, single 3.5" turbo back with a flowmaster pro series muffler.
blow through with 4 fi bl 10's, crescendo BC5500 amp, double din ,big 3, 3 monster batteries, 220 amp alt
3rd gen 05 steering wheel and auto window conversion
custom built turbo kit running a HE351VE holset