I am not sure if this is the correct place to ask this, but here goes. Due to the high price of gas, I intend to convert one of my pickups to propane. To get the most out of propane, I believe you must raise the CR. My question is, how much ratio should I be shooting for? The engine will be a 10.25:1 396. I don't intend on spending a lot of money on doing this, surfacing the head will be it, no new pistons. I am thinking 12:1 would not be too high, but I may be missing something. I also doubt if I can get that high by simply surfacing the head, anyone have any ideas what I can gain?
