update on my progress now remember I have an amc258 in my b3b . I took an old fan shroud out of a amc eagle and worked on it to fit my radiator took it out on the road with no noticable change but looks kind of cool. than just now I got a new fan clutch I just cranked her up the sound of air rushing thru the radiator took me by surprise the air I felt getting pulled thru the grill is way stronger now it is storming where I live so I will have to wait for the weather to clear for my next test run but I can't see how it can't have been improved. That 1974 clutch fan I think has been the problem all along. It will feel great to fix a problem I have had for a while but like I said earlyer it only showed this problem in the summer. Neil