Put a Champion 526 radiator in a 71 swinger?

Well I am starting to do this install. The aluminum strips I bought as specified in the instructions are 1/8 x 1". But they honestly look too narrow to me. What do you all think?
I see where one man used a piece of angle and drilled the fasteners into the side of the fan housing.
I have the fans centered side to side on the radiator. The fans are contacting the radiator fins, not sitting on the mounting tabs. when the aluminum strips are in place the fan is still contacting the fins. There is a sizable gap between the radiator bracket/aluminum strips and the tabs to mount the fan.
Should the aluminum strip be thicker and wider?