Thanks for the help. Aren't all the 23 spline input shafts for the older gear driven cases? Is there anything I can do to upgrade/beef up my taco case other than cryo treat some (or all?) the parts?
Also, I know I'd have to get different length drive shafts. Is it difficult to cut/remove the old u-joint and weld up my own and have a shop balance them? Should I just buy some beefed up aftermarket parts and proceed with the aforementioned welding/balancing? Or am I better off just ordering some?
Not too bad to do yourself. Stick with the stock Toyota components...they are strond like bull. Theres a reason they make D60 axle to Toy driveshaft flanges.
Otherwise they are identical. Same double row 32 ball input shaft bearing, same heat-treated all-new output, same coupler.
I have an Inchworm at home and have physically verified that the differences toughted by Marlin aren't differences anymore.
Lastly Marling is more all inclusive, they inlcude a shifter and base, and shift knob.
I sourced my own shifter (ebay) and got a free knob from Inchworm, and save $600 over Marlins price. And that was upgrading to Marlins total spline input instead of the Trailgear one.
Keep the money in your pocket, buy Inchworm. Either will get the job done.