sure your gauge is right? i have 2 gauges,both craftsmen but they read different on the same motor.if i'm not mistaken those motors usually run in the 115lb range in good shape.i have seen a very signifant increase in compression with a de carb if it hasn't been done for awhile or the motor been setting.i picked up almost 20lb in 2 cylenders on my 96,4 was 120 +- a couple lbs,2 were 92 and 97,decarbed and they came up to 115 118.if its cheap enough a ring job isn't bad..
seen many run good and along time on 80-90 lb.