I use a 5 gallon plastic gas container to mix it.
You only want to run with 1/4 tank or less at the track.
1 gallon of Toluene to 2 gallons of 94 octane with give you about 104 octane.
Cost is about $15. Cdn a gallon (not cheap where I live) from most hardware stores that sell paint thinners. The downside is the toxic emmissions that are given off when you burn it.
Perrrrrrfect for running that smaller pulley at the track with no KR.
Very noticeable performance gain.
I use it with my Firebird carburated car too with no problems.