Guys, been following this thread since the beginning and by no stretch of the imagination am I an expert on this subject, but you need to us a little common sense(I think)? The air under the hood does have some cooloing effect on the motor, but why all of a sudden are your Mopar's having heating problem, Ma Mopar designed and made the cars with bidder engines and more HP and probably either of you have and they never had over heating problems. There is more than enough places for the heat to escape just following it's normal path, generally, over the engine and across the exhaust pipes (headers?) and under the car. Most people wrap exhaust headers for better scavenger effect and a little less heat under the hood. My guess, and it is only a guess, is that you either have a flow problem, with either the coolit or the air flow across the radiator. Not enough rows of fins in the radiator, water not staying in it long enough to cool or a partial blockage some where in the system. An under-drive pulley will invrease the fan speed, thus increase air flow, that should help if everything else is up to snuff. I just hate to hear that you want and are willing to chop up (drill holes) your cars. BTW, hood off car lets more air flow through the engine compartment. Any how, jm2cw. Dennis J. Ollie wrote: > > Steven and others, > Please keep sending your 2 cents. Maybe if we can collect enough money > we > can solve this problem! > Ollie ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.