I now have 2 T5's in my garage. Both are NWC. One is from a '91 S-10. It has a 3.76 first gear and was made for an electronic speedo. The other was behind a V8 in an '85 Camaro. First gear is 2.95. Speedo is mechanical. I am going to bolt one of them to a Mercruiser 120 and replace the 350/350 combo in my '36 Chevy pickup. I have the pieces to use the '91 behind the Merc (SBC identical) or I can use its tailhousing on the '85 I am wondering if the first gear in the '85 would give me a reasonable takeoff from a dead stop. Currently the truck weighs around 2900 and the swap should take about 300 off of that. I have a 3.90 rear but also have a nice 3.73 I would consider swapping Current tires are 30". I could replace them with a smaller diameter if needed, but don't want to go so far as to defeat the purpose (lowering highway rpm's, currently 2900 at 65 mph). Can't imagine a formula for this, I hope I can get some experienced "seat of the pants" advice. I don't do burnouts or race, just want to make sure I could leave a red light without slipping the clutch ridiculously. On a side note, since the tailhousing will be from the '91 either way, I wonder about adapting to a mech. speedo. All the advice I see is about using a WC tranny in this swap. Are the shafts and alignment holes the same?