ESPO 340 6 leaf spring set for my 1964 plymouth Valiant. Need guidance on either going -1 or stock hieght

Yes, I will tell you when it comes to springs they will vary .
This photo is of a 63 Belvedere with 2'' drop and a 100 lbs rate increase.
The tire size was way too small on the rear in this photo. I go by the fender lip to top of rim.
Kinda looks taller than the 1 inch drop springs. So,,,,

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