T56 looks right at home

[Quik]

@SixSpeed454SS

Mine runs 70mph in 6th at 1600 rpm with a 27" tire and 3.73 gear. I’m goin to 4.56 (only 3 ratios available - 3.73, 4.10, 4.56 for my 14 bolt 9.5" ring gear) to raise the cruise rpm to around 2200-2300 in 6th. In the 1/4, I’m shiftin into 4th just before and I cross the line at 3000-3200 rpm. With the 4.56s, It’ll be up around 4500-4700 rpm in fourth.

yea youre combo is totally different then mine. 4500 rpms isnt enough for my old 6.0 to cross traps in rather alone the 6.7

well hopefully by Xmas the 4.88s are availble