F body rear spring relocation kit

[CM360]

Mopar made them for the A,B and E body. Did they make them for the F?

 

[greymouser7]

I just bought some with the tax return this year- do some searches on the forum
I have allot of stuff going on but the second to last page of the heavy metal hell raiser thread has a list of parts purchased for my car and this includes the leaf springs (i think they are one of the longest) -to include parts & whom i purchased from & cost

summit racing sells super stock springs as a pair for our cars and when you search, it's the same chassis with the diplomats thru 1989

 

[Aspen500]

He was asking about spring RELOCATION kits like the one's that move the leafs inboard 2"(?).
As far as I know, Mopar only did the A,B and E body.

 

[F body Deconstructor Jim]

The F/M/J body rear spring hanger mounts directly on the underside of the frame rail. Moving it in wouldnt buy any extra space for bigger tires.
The A bodies have a bracket attached to the rear of the rail that moves the hanger outward. Eliminating that allows the spring spacing to be narrowed.

 

[Locomotion]

I remember reading a story saying that F-body springs are "toed-in" a little bit. It went on to say that E/B body offset shackles will help straighten them, gain a little tire clearance at the back half and perfectly align the springs with '68-'70 B-body 8 3/4" housing spring pads.

I don' know if it applies to 2-door cars, (I have a wagon.) but I was able to gain some tire clearance on the front/inside of the rear wheelwells with a big hammer!

 

[CM360]

I think you are referring to using B body rear with E body springs. The spring pads holes are 1/4" wider on the F than the B body. Some guys use a come- a- long to pull the springs in to match up with the pad holes. Not a good idea if your using this on your race car. Probably even a street car

 

[Locomotion]

I think you are referring to using B body rear with E body springs. The spring pads holes are 1/4" wider on the F than the B body. Some guys use a come- a- long to pull the springs in to match up with the pad holes. Not a good idea if your using this on your race car. Probably even a street car

I agree that it's not a good idea to put anything in a bind by forcing it to fit. But using the 3/4" offset shackles, it would move the rear of the spring about 3/4" inward and the middle of the spring roughly 3/8" inward with the front remaining in the stock location. There is usually enough "slop" in the fitment to line up the spring locating bolts with the B-body spring pads without a bind. The pads were already cut off of my housing so I couldn't confirm the OEM B-body pad location fitment. But I believe it's a sound theory. The shackles did not put the front spring eyes in a bind with the very slight angle change on my car.

As for spring usage, there was a Mopar front spring mount kit that allowed the shorter leaf springs to work in an F-body. But ideally, it would be best to have proper length leaf springs. I got a set of used, custom made SS springs for my wagon but did use the 3/4" offset rear shackles.

I think I got it!

 

[CM360]

I agree that it's not a good idea to put anything in a bind by forcing it to fit. But using the 3/4" offset shackles, it would move the rear of the spring about 3/4" inward and the middle of the spring roughly 3/8" inward with the front remaining in the stock location. There is usually enough "slop" in the fitment to line up the spring locating bolts with the B-body spring pads without a bind. The pads were already cut off of my housing so I couldn't confirm the OEM B-body pad location fitment. But I believe it's a sound theory. The shackles did not put the front spring eyes in a bind with the very slight angle change on my car.

As for spring usage, there was a Mopar front spring mount kit that allowed the shorter leaf springs to work in an F-body. But ideally, it would be best to have proper length leaf springs. I got a set of used, custom made SS springs for my wagon but did use the 3/4" offset rear shackles.

I think I got it!View attachment 12345

The spring pad holes are .44" wider on the F body than the B body.If your still running NHRA, that offset shackle is illegal. I also got bounced for using a Firm Feel front hanger and an E body HD leaf spring. I remember at the beginning of IHRA CM class, they allowed the spring relocation kit but frowned on it a few years later on any new cars that were built for the class. I opted for the CalTrac system since it is designed for the F and M body. I also thought that sometime in the future I would change class from N/SA to H when I got tired of running the 318/4. I missed the '15 season with some head/rocker arm issues.

 

[Locomotion]

Thanks. I'll have to do some more research because I've heard both sides. I was interpreting the rear OEM mounting point as being on the frame because the shackles themselves are not the "bracket" or in a "fixed" position. The aftermarket bolt-on adjustable stuff today is more sophisticated than what SS use to have not that long ago.

I was an early IHRA crate motor competitor and have the full 3/4" offset kit on my Dart. But I'm investing in the Aspen for NHRA hoping for more "opportunities".