Might want to make a shroud with a hole in it for the fan, so air is pulled through all the radiator, not just the part in front of the fan. Use a flat piece of Al, secured on the edges to the radiator frame. Fan should be partly through shroud. Get some flexible rubber mat pieces to make flaps so at speed the air can go right through the flaps-look at VW Rabbit, etc.

Ed

'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.