Recommend A Smooth Street Shock?
What about Sachs?
Anyone used them?
Sachs are OE quality replacements. I installed them in my 2006 BMW all 4 corners; they ride pretty good from what I'm used to. That said, when I ran through RA, the part numbers quoted for the '61 MY crossed to the same numbers for later models...so, whatever fits a later model should fit yours.
I compared the numbers on the KYBs I believe you're probably running...
F = KG4509
Ext = 14.72"
Comp = 9.53"
Stroke = 5.2"
R= KG5511
Ext = 21.57"
Comp = 13.39"
Stroke = 8.19"
...to some Monroe-Matics listed for a '72 Dart (which have the same mounting ends according to the attributes)
F = 32022
Ext = 15.75"
Com = 9.875"
Stroke = 5.875"
R = 31131
Ext = 23.375"
Comp = 14.125"
Stroke = 9.25"
From the looks of it, you're only "losing" less than an inch of compressed height and by that time you're likely already on the bump stops. From the looks of it, your Val is rockin stock or near stock ride height, so I see little danger of bottoming out the travel unless you drive like an asshole over terrible pavement...I'll leave that to you to figure out, but if it were up to me, I'd go with the Monroes...of pretty much any series