Your mass air could be going bad, with the popping, put your timing at 14* and use 93 octane, how bad is the popping? mine kind of does it too, when i start it hot, it goes 'blub blub' if your gonna get a chip, get a custom chip, or just get a foxbody ecu.
373 grs arent bad on the higway, but if your like me, you want to cruise at 80 mph, then go with 355's, i have 3.27's, have to wind it out before i spank rice from the lights, but it pulls pretty good for higway gears, you beter believe im getting 373's as soon as i have the cash.
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Police package 5spd 90 Lx, Stock original motor, 3.27grs, BM fan, fms 10.5 clutch, D&D quadrant, and adjuster, ADS chip, 180 stat, mac cai, mac h-pipe, mac subframe connectors, ASP crank pulley, ripper shifter, 26x10.5 M/T sport pros welds. 246 hp according to analyzer 
Race weight: 3,120
E.t-13.57 with 26x10.50's e.t. streets. 1.88 60'
mph- 99.92 mph
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