yes you are all on the right track as to my question.
I have indeed got a 3sp auto with the axle ratio of 3.07
Need the big tires to get through the big holes left by Nissans and Toyotas with 35' tires. Not much left of the track after those guys have been through
Getting the teralow kit works out to $2500 New Zealand Dollars, ouch thus if there is a better way I'd rather take that route. How hard to regear the axles to 4.10 as suggested ?