I would have to agree with Jerry. Fan blades can come apart, and you don't want to be in the area when they do.
Jim
Yep, my in his 30's cousin did a total nut and bolt down to bare frame on a M38 Jeep. Built a nice Buick V6 for it and it was a nice rig. While leaning over the front and with a hand on the throttle linkage a fan blade came off. A few days later I was at his funeral.
RonR