Clutch fan vs derale single 2400cfm fan

70 Buster 340 said
Are you running solid motor mounts?

Because that is close shown above

The trans mount is captured and restricts forward motion to less than 1/4 inch.
My son's been driving his car like this for near 10 years, and he's a very spirited driver.

https://www.forabodiesonly.com/mopar/attachments/fan-clearance-004-jpg.1715195331/