I think that question will come down to tire choices and gear ratios. The extra inch in back is nice for added traction but not a huge difference. I think you need to look at the other two items first.

karbuf wrote:

Ah.. good word.. that helps to start thinking in the right direction..

my thoughts are that I am stuck with what I have for gear ratio in the differential... However, I can use rim size and tire profile to have some affect on final gear/drive ratio..

Would be helpful to have torque and hp curves for the stock '88 NA 2.5L.. At least that would get me in the ball park for making calculations, without spending a ton for dyno time..

Any thoughts?