I'm looking to convert my F150 with 300-6 over to propane. Propane around here runs about 1.68 a gallon. The main reason I want to convert is for better offroad performance when I convert it over to run trails 100%.

Propane has what, 110 octane? I was planning to bump up the compression on the 300 to around 11 to 1 or so to take advantage, and also run a 4bbl mixer..

also, how do your propane tanks have to be mounted to be DOT legal? Just curious, since I want to be able to retain my state inspection.