Anything is possible with enough money, but stroking a 1.8L would take quite a bit of it. There are no off the shelf parts to do it, so think custom forged everything. The end result might be problematic too, as the poor little 1.8L needs to rev pretty high to make its power in stock form. You could get a little bit more power lower down and sacrifice high RPM durability. You are better off to just upgrade the motor with something else unless you just really want to be different. (or bore out a a G200 and build a high compression 1.9-2.0L motor)
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95 Isuzu Trooper Daily Driver
86 Isuzu Trooper reliable backup
77 LUV 2wd stock beltway blaster (resting)
79 4x4 LUV project: 2.6L, 5spd, 31s (eventually)
MEPR: Man, my 4x4 makes all other LUVs look good