I have a 40 with a v8 and soon a sm465 and want a doubler between it and my t-case. Are the 60-series t-cases up to v8 power and a doubler? I'm thinking of using Marlin's toybox. Anyone have any specs on shaft sizes and spline counts, gear ratios, overall strength figures? How reliable are they? Do they whine the same as my 3spd t-case does? Thanks
