Hello All.....I went from 2:73 prairie gears to 3:73's last summer in my 71SS.....I love the performance, except that when I hit 45 or 50, Im reachin for another gear !!! That part I dont like...I have been thinking of getting rid of the 4 speed and swapping in a 700R4, performance built...I guess now is the time, as Im really tired of shifting anyway, and that way I can have my g-force acceleration, and still drop it in overdrive, and cruise at a reasonable rpm...Has anyone had any experience with this transmission, and if so, how was it...I understand they have come a long way, and are now very dependable when built correctly...any comments either way? Oh, its a 454, pretty far from stock... Thanks...John