How narrow can I go with the rear end on my 66?

[Britt]

My dad said he found a nice 9" rear end that was 53" wide. Now thats 4.25" narrower or 2.125 per side right? Well Is this to narrow to work (assuming I relocate the spring and shock plates of course)? Would I have trouble with having (or finding) a 2.625" back spacing rim?

Thanks for the help....

 

[Fostang]

53 inches from where to where?

 

[GaPonyFarm]

I'm guessing you mean 53", flange to flange. It should work as the '66 should be around 54.25, or there abouts... What did it come off of? I can't think of may cars that would require 9", that are more narrow than a Mustang...

 

[HistoricMustang]

With 3.75 backspacing you can narrow a stock 65/66 rearend by .500 inches on each side. This is how I got the 8 1/2" Torque Thrust rims up under mine. You will need to "grind" on the shock mounting plates a tad for the brake back plate to mount.

HistoricMustang
www.historicmustang.com

 

[Britt]

Ok, How wide is a 66 mustang rear? I thought it was 57 1/4. Is it 54 1/4? The guy said he had a rear that is 53 inches flange to flange.

 

[SandSprite]

65-66 rear is 52.25" flange to flange, and is 57.25" drum face to drum face.