welcome to a kickazz site!, now 140k isnt bad, long as its not burning 3 quarts a week, but stiffen up the chassis with some subframe connectors, if you want a little more outta the 5.0, advance the timing, get rid of the air silencer (if it has one) get some rear gears, and rebuild the trak loc while theyre in there, 140k is good for an 87, but a rebuilt 306 would be a smart move, you will get more opinions im sure......take it easy.
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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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