Just scored a 78 Diplomat wagon.

ccwrench64

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Jul 29, 2026
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Downeast Maine
1000010896.jpg
1000010896.jpg
Don't know much about it yet but it's a J code 360 4 barrel with 41000 miles. Gonna need rear springs. Looking forward to getting it on the road for my wife.
 
Looks nice!
Good engine option. That means it already has 8 1/4 and 5 leaf springs so all the more common upgrades were already done for you stock!
You can get the springs online or from local spring shops. Some people buy the older style brackets to get rid of the iso clamp stuff (the rubber bushings in the center of the spring where the axle sits on it) while they're at it.
 
Looks nice!
Good engine option. That means it already has 8 1/4 and 5 leaf springs so all the more common upgrades were already done for you stock!
You can get the springs online or from local spring shops. Some people buy the older style brackets to get rid of the iso clamp stuff (the rubber bushings in the center of the spring where the axle sits on it) while they're at it.
Thanks. Yes, 8 1/4 sure grip. Not sure ratio yet. And 5 leaf springs but they have no arch.
 
Holy smokes man...that's the Holy Grail of M-Body Mopar world (lol, well, for this wagon nerd here at least - my daily driver for ohhh about 15 yrs. was a 2006 Mazda6 wagon).

Anyways, sweet find...how the heck did you score this gem?
 
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