I have a 83 c10 with a 350 and th350 trans, I want a trans with overdrive because I do highway driving alot and I need that extra gear, also I want to change my rear end gears to 3.73 or 4.10 eventually, I have a 01 z71 with the 4l60e so I wanted to convert one into my c10, I found a guy that has one out of a 98 z28 camaro for $100 so I can't really pass that up, I just need to know what I'll need to do to make it work, I know I need to move the crossmember and possibly shorten my driveshaft, but as far as electronics and speedo what do I need