Stacking aluminum lowering block?

72bluNblu said
For a short block I really don't see the issue. The force you're worried about is on the U-bolts.

Which 6 leaf springs are you using? The absolute highest spring rate those should be is 130 lb/in, if they were for the 383 cars. The standard XHD's are only 110 lb/in. Neither should really be really stiff or raise the back of the car all that substantially.

Fair enough!

I looked at my springs, not sure, but I think they are 2835046 which I'm unable to find anywhere. The closest I can come up with is 2835064 which according to an old for sale post here fit a 69 Dart 340. According to General Spring that spring in a similar configuration 6 leafs with 35" rear and 20" front segment will work on 64 to76 Dart/Valiant and 64 to 69 Barracuda as well as providing 2" of lift. They are used springs that have a decent arch and as I said put the rear super high.