A998 Trans in '66 Dart

Wow. So what i am getting from this is that the 998 and 999 are the same dimensions as the 904, with the later (post74/75 or so) having lower gear ratios. My questions are; Does the lower 1/2 gear ratio create a extremely large split between 2/3?? Is that really a bad thing, having the lower gear ratios concerning acceleration?(say 1/4mi.). I built a 318/331 using the format from the Hot Rod magazine (approximately - with a few of my own touches) and am pretty certain it makes close to 400hp (no affordable local dyno). With the small wheel wells in the early A body, it may be beneficial to have the lower 1/2 to get the tires to hook more quickly? (i have a car that I do NOT want to mini tub or hack up!) Last questions - how do I identify the early/late 998/999 trans without disassembly and does anyone within a 500 mile drive from Seattle have one they want to part with! :-) Thanks! Major0014/Cheech14