This is VERY helpful thanks! My fan sits closer to the radiator and isn't as exposed as yours. Your firebird fan bolts directly to the pulley and mine has an additional 1 1/2 inch spacer, so I'm going to order a new fan clutch and remove the spacer and see how it goes. I verified my fan is from a 69 Firebird (3991431) but it's also a 7 blade 19.5" so although it might not be original for a 67, it does have the right amount of blades and length, so I'm ok with that.

I appreciate all your help, the pictures made all the difference!!!