when i had the 3.36 rear, 55-65 would constantly shift from 3rd to 4th and back, always thought 3.55's would drop it just enough. i have upgraded intake, carbs and headers since and have lumps to install along with decking the head for another 1/2 point in compression. that in itself may/may not get me over the hump. the 5% reduction from going to 3.55's would! i have several concerns though. first, i plan on using a taller tire (eventually) and that will add back +/-2%, i have the 200 4r, not the 700r4 so first gear not as low, i did have a 700r4 long ago and do remember losing a little off the line when switching to the 200 4r, and last and least of concern, if i ever decide i want a bigger cam, i might need the little extra from 3.73's. i have given a lot of thought to 3.55's but feel i am safer with 3.73's. running the interstate, i am usually between 2400 and 2800 rpm's. screaming by todays standards but normal for those not having overdrive. i can live with the 4.11's but would like a little lower highway rpm's. i am not racing at the track, just want quick acceleration. at some point, gearing can be too low and actually hurt, not help. are 4.11's at that point?
