Rear end options

[PostalBGraham]

I am replacing my 273 with a 340/727 in my '67 Barracuda. I am having trouble locating an 8 3/4 rear end. I am told that some guys are using old Ford Ranger 8.84 rear ends. I have access to an F9 rear end, no housing or axles. Has anyone here used either of these Ford rear ends?

 

[ta3834bbl]

Yes, you can use a 9" ford, or an 8" also. I got a 72 mustang rearend and it bolted right in but had to use an adapter U-joint for the driveshaft. Even the e-brake cables worked. That rearend is about 2" overall wider though, so check your wheel spacing for that.

 

[340mopar]

If it's a mild 340 an 8-1/4" out of a later A-body will work fine. It would be a more straight forward swap everthing considered. The ring gear diameter is not the only determining factor as to how strong a rear end is. It's the same rear end in my 81' D150 and 77' Cordoba with a 400.

 

[mikedevore]

I am replacing my 273 with a 340/727 in my '67 Barracuda. I am having trouble locating an 8 3/4 rear end. I am told that some guys are using old Ford Ranger 8.84 rear ends. I have access to an F9 rear end, no housing or axles. Has anyone here used either of these Ford rear ends?

I have been told the ford is a strong rear end, but it also takes some extra horse power to turn. more so than a 8 3/4 or 8 1/4. has any body else heard this?

 

[PostalBGraham]

I was also told that the 9" rear end was "heavy duty" and "indestructible". The 340 I'm putting in is bored .030 over with 10:1 compression. The intake manifold is an Edelbrock high rise with an Edelbrock 650cfm carb. I'm not sure what the gears are in the 9" rear end. I suppose that has a lot to do with whether or not the engine has enough horsepower to turn it.

 

[dgc333]

I have been told the ford is a strong rear end, but it also takes some extra horse power to turn. more so than a 8 3/4 or 8 1/4. has any body else heard this?

Yes, the pinion is further below the center line of the ring gear than in the 8 3/4 or 8 1/4. This requires the gear teeth to be at more of an angle which increases friction.