Soooo I'm looking to drop the rear end of my 52 F1. I have the posies drop leafs all the way around. How much would I drop roughly in the rear if I put a reverse eye rear main leaf?

 

Depends on the manufacturer. If your staying with posies I'd give them a call. They should know exactly what it would take to drop your trucks rear stance the amount you want.

 

How much clearance between the axle tubes and the frame as it sits?

 

Just checked the posies site on the 48-64 ford truck front and rear lower springs page 39, the picture shows the main leaf already has reversed eyes.
On reversed eyes the eye is below the arch and on stock the eye is above the arch if that explains it clear.
You could use the dual flex mono spring which posies states is safer than just the mono.
http://www.posiesrodsandcustoms.com/...OOF-4-4-14.pdf

 

I'll check that out tomorrow Gerry. Just got home from work. Racking my brain how to drop this rear 2"'s.

 

Albuquerque I'll have to measure. Truck is at the garage getting worked on.