best bang for my buck

so ive got my 1992 merc grand marquis and im looking for the best performance chip thats reasonably priced so what do u guys run or have had good luck with and would recamend?

you are limited to only getting a chip. they are not cheap. $3-400.

i would either recommend sct or dennis reinhart.

do you have dual exhaust yet? that would be your best first mod. easy way to get 15 hp