Thanks, Ted. I run a 4.56 gear, torqueflite, 6500 stall. I have some latitude on trap rpm, so a drop from a 106 roll out to 101 to 102 would be workable, as long as the tires have some growth to them. I do run a trans brake, so I assume I need at least a medium stiff sidewall tire. Goodyears smallest listed Supergas type tire comes in at 5 lbs lighter per tire, 102 roll out 14 inch tread.