Have a 71' Blazer with a 350, 4spd, Edelbrock cam and intake with headers and A/C. My stock fan pushes alot of air and makes alot of noise(wind). Anybody have any feelings about flex fans. Do offroading but never at a snail pace, some towing (light) and alot of highway. Also looking for some free flowing (not glass packs)mufflers with a deep growl but not too /forums/images/graemlins/k5.gif loud. Summit and Thrush have some cheap ones in the Summit catalog. Have any opinions?