s10 blazer 2wd blazer and 15x10 rims - offset / backspaci..

I'd like to swapout the factory rims on my truck.

I'm currently running the stock 15x7 -25 offset rims with 31x11.5 (had
to cut some wheel well) and install a custom stopper so it would not
rub - still rubs a tiny bit on u-turns. The tire look real big and
nice on the truck, but not happy with the wideness. those same tires
looked great on my ford ranger with 15x10 rim I had.

Just wondering, what offset should I get for the blazer? I've seen the
15x10 in a -44 offset. I Get the feeling that tire and the 15x10 will
NEVER work on the blazer 2wd with those big tires - no matter what
the offset of the rims.

Thanks for any info.