glensexton, Good deal. I was hoping that I was not to far off with my thoughts. 2.73 is what it says on the inside of the glovebox and I should take that at face value, I will cralw under the rear of the truck and check for a, ID plate on the pumpkin? I have always worked with "9 rear axles, so quick question, how do you change the gearing on the chevy axles? TH350 is what is in the truck now, I have a TH400 that needs rebuilt on my garage floor, but no 700r or 4L60. I ordered some bits for my grinder from eastwood for port work, nice and slow:-) Do you have a better cam in mind? Hooker headers are on the truck now, with 40 series flowmasters, true duals right now, I was planning on putting in a crosstube when I pull the engine for the swap. I appreciate all the advice, and will update progress of truck.