Like I said, I live in OK and don't really notice any problems. I did follow the article posted in the tech articles of inliners.org. Many people swear heat is mandatory. Talked to Patrick's trucks and he told me he has run for years without heat. He advised trimming power valve springs and bumping timing until throttle response is "crisp" and that when I was ready, the curve on a dual point would "really wake it up" I don't drive it enough to have real trouble and have been concentrating my efforts in other areas on the truck lately.
patrick\'s trucks I post this for info on how to get ahold of him. He was a very nice guy willing to give great advice. I do not intend it as advertisment of his business. Wrestling with this dilemma as we speak. Correct me if I have crossed lines here.