Picking gears

I had a 4.30 gear with 28" Good Years on my '71 340 Cuda (365 on track hp), weighing 3550lbs with a 4200 verter and trapped at 6100 at 12.3's@108, with 26" street tyres which is all we had (1984) it was murder on the long runs, 53mph@4000rpm:(, but boy was it fun 0-60:D