Out of curiosity, why does everyone choose the 32/36? Just for the fuel economy?
I've been thinking of putting a weber carb on my 20r, but I feel like I could use all the power I can get. Would I be better served by the 38, or is the power different marginal? I don't want to turn the humble 20r into a gas guzzler, but if we're talking 1or 2mpg for a noticeable increase in performance.... might be worth it to me.