For those of you interested... I just had my 3rd motor installed 2,000 miles ago.... the 31 spleen axels, 4.10 gears and Eaton posi is agood comb. it's what I run. Make sure you get the heavy duty Eaton Posi. it puts 800 lbs. torque to ea. wheel compared to 350 stock. Also make sure the ABS gears come with the kit. Agood rear end shop can do the complete swap in 2 hrs. I run 510 rwhp on 91 octane at 7000 rpmsm 417 lbs torque, 14 lbs boost with CP 8.3 comp. pistons, aftclr, stage 2 heads along with a few other goodies. 11. 02 @ 126 mph. Still have 40 more rwhp on tap with a 4 degree advance module..)need Torco Fuel Accelator to ngive you 102 octane to handel the advance) Have not tried the module yet or icing my aftclr box. This is supposed to give me a total of 60 more rwhp. (570) this definately puts me into (with hook up) the mid to upper 10 sec range.
