Torco is essentially concentrated MMT. It leaves orange haze/deposits (amount dependent on amount of Torco used) on the motor internals. Race gas does not. Mix in 5 gallons of VP MS100 (orange) with a full tank and you'll be around 95 octane for a full tank. More expensive, but no deposits and a nice smell from the exhaust.
MS109 if you want a higher net octane. The stoich isnt too far off from E10 pump.