Sounds like u have a handle on it. But I`m sure my engine makes a hell of a lot more heat than urs. I do have the 1200 cfm throttle body sealed to the hood, always have. I do have (roughly) two 2 1/2" x 12" vents along side the 6 pack scoop. I definitely don`t have room for any clutch type fan. I doubt if it would be any better than a mech fan anyway in my case. For the 17" fan to even work, I had to build the shroud up about 2" on top and close it in to pull air w/o a loss. I cant run a bigger fan, just no room anywhere . I could cut the rad. opening out to include the side tanks on the crossflow rad., I didn`t want to because of what the car is. I can`t see that really making much diff. tho , but a little is all I need. I also could move the rad. forward by hacking the cradle up I guess, and that would give a little more room , where I might could run a bigger diameter fan. THANKS for the insight , but most of it just don`t fit my case. I think I`ll drain it down and cut the cradle out to let the side tanks have air next. ??? Front booster fan, relay, horn, and stuff in the way= pain in the --------LOL I am wondering what effect a 15 pound cap would have in place of the super stout 16 pound that came w/ the radiator .When I saw how tite the upper hose was , it scared me a little !