Trans Decision

[BigDan3131]

So here is my dilemma, I have a 1965 GMC long bed fleetside 3/4 ton that after removing unneeded weight and going to a glass hood. I plan to run a tire near the stock height of 31.5" but with 18" rims, I think I have talked myself into going with a TH350 instead of the TH200R4 because based on how much it would cost to build the OD trans plus the cost of the new convertor I can do a ring & pinion swap to 3.54 gears and keep the 31.5" tires. Since I'm trading my bodywork skills for an engine build I figure that a 6.0L with a cam swap and the usual speed goodies my lack of gear will be made up for it with the power I make at my cruising speed [70] down the freeway.

Comments?

6.0L with Dual 450 Carbs.