I’m looking into alternative fuels like propane. I have a 1986 GMC sierra classic 4X4. I would like to use propane on this truck but I don’t know much about it. I welcome all info about this. Is there a kit I can buy for my truck? Manufacturer’s names websites any link will help. If you have propane trucks drop your info here. Will I need to change the cam or pistons in the motor?