can i go 23 spline in the front? the rear case will have the 4.7 gearset, which was in a 21 spline setup. i dont exactly know how it all fits together, i just know i have to totally rebuild the front case, and i wanna get the toughest stuff in it.
no, you can't do that. the front case has to match your trans.
Maybe try to swap your 21 spline set for a 23 spline set OR you could run the 4.7s up front, and get a new 23spline coupler for your MC-07 and a turbo input and run stock 23 spline gears in the rear case.
easiest/cheapest is to run 21 spline front and rear, what you had before. If you want beef your gonna have to buy/trade at least 2 items.
