Everything sounds good to me but the converter and 26" M/T slicks. I've been there done that and I can tell you a 27" or 28" tire will hook better and go with the 3.91 gears. I bought a dynamics 10" 3500 converter and I picked up three tenths from another brand 2800 stall converter. If it was me I would run the 3.91 with 28" tire and a 3000+ converter. You will be mid 12'S or better and will drive on the street no prob.