I was looking in the parts book and they make fans with a more agressive bite. mine is like you describe ss with small SHARP blades. My big truck has the fact fan and the blades are bigger and have more pitch.
What concerns me is it ran cool 180 for yeARS and since the oil pump , valve adj and vac adv it is much hotter. i have unhooked the vac adv, cant see oil pressure being a prob . if i get the waterpump back in tomorrow i am gona look at the valves again. Re; fan spacer my big truck , s10 and two ford (sorry) tractors have the fans 2" away from the rad and run fine.
