i got an 89 s10 blazer that has 235/75/15 tires right now and with a stock suspension could i run an aggressive 30/9.5/15 with no mods or if i was to do a 3 inch body lift how big cud i go and i was wondering what a good brand body lift that will come with everything i need.
thanks.....

The 30s will fit, assuming you are using stock offset wheels. I run that size on my 92 and have not experienced rubbing or trimming either.

so what you are sayin is on my 91 i could put 30s on if i have 235 75 15 cuz that would be kool

You might get some rubbing while turning.

With stock on both my 1st gen (3" body lift) and my second gen (no body lift) I've run 31x10.5's and not had any rubbing probs...

by second generation do u mean like 95 blazer and newer? iu said that u put a 3 inch body lift on it how hard was that to do and what does it require me to do extra?

second gen=95 and up, with out a body lift you can easily do 30x10. Body lift install was pretty simple. I used the Trailmaster 3" body lift kit. Comes with everything. only 2 things you need to do is weld the extention onto the shift linkage (unless you switch to center shift which is what I did) and add the extention to the gastank filler neck. Both these parts are included in the kit.