What was the correct fan set up for a 68 340 with AC?

4spdragtop said
I was just flipping thru my parts manual. I dont see a spacer listed for a 340. I see 1 fan listed for a 68 318 and 340 with ac. Its 7 blade with 2.25" pitch and part# is 2863215. You say you have a MP fan?? So not the orig fan?? Maybe that is the problem??

Great. I think this answers all my questions. My guess is that the shaft on the Mopar Performance clutch is shorter, the pitch on the fan is different or both. I just need a little clearance to be more comfortable.

I will start looking for parts.