E Body front leaf spring perch/eye bolt diameter differences?

[Doc Corey]

I bought a set of used leaf springs for my 71 Challenger. They use apparently, a 9/16th" front eye bolt, but my old springs are 5/8th". I got one loose front perch from him also and it is 9/16th". Anyone know if there were any year variances? He is sure they were removed from a e body parts car. I can make them work either way but I'd still like to know. Thanks

 

[moparlee]

They are 5/8"-18.

 

[Cud@]

I bought a 71 Barracuda Grand Coupe from Wyoming that had 9/16 bolts in the front rear spring perch, I also bought a 74 Cuda donor car that had 5/8 bolts in the front spring perch.

I believe both cars had the original front spring perches!

 

[Doc Corey]

I bought a 71 Barracuda Grand Coupe from Wyoming that had 9/16 bolts in the front rear spring perch, I also bought a 74 Cuda donor car that had 5/8 bolts in the front spring perch.

I believe both cars had the original front spring perches!

Thanks. I ended up just drilling the small perch up to 5/8th's and we're good to go!