I have had my B16 in for about 3k miles now and haven't had any major probs with it... I had to replace the coil last week but that wasn't bad. but it has started to overheat on me a couple times recently, it only happens when I'm on the freeway doing about 80 (rpm = 4k in 5th), My guess is that because the stock radiator from my D motor had 1" in and out and the motor has 1.25" in and out that when it gets up to higher rpm's for an extended period of time the radiator just can't keep the engine cool but I have never had a problem when I'm just driving around town because the rpm's are usually below 4 for the most part I'm thinking that I will just go straight for a fluidyne so that I don't have to worry about this anymore. anythoughts on this topic? edit: will my stock fan still work fine or am I going to have to buy a new fan as well?