Computer chips/and Cats

I am thinking of getting JMS to burn me a custom chip to raise my fuel cutoff to 7500 rpm and turn off OBD because I can't find my powerloss problem and I think OBD is cutting my timing back. Anyone with chip experience in doing this? Did it work?

The other thing that may keep me from doing this is if my problem is clogged converters on my Bassani X. I will check them but I'm not sure how to tell if they're bad if I get no codes from the computer. Any ideas? suggestions?

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(96Cobra/softtop-3.73,almdrvsht,fancontrl,steeda sbfrmes+shifter,eibachspgs,pulleys,Bassani X pipe,C&L 80mm
Cobra DYNO 301rwhp horsepower w/out steeda timing adjuster
93 Ford Probe Gt(slower but turns)