I do have two single adjustable Aldan shocks I can give you. I went across a very bad RR track and blew out the seals, that's all that's wrong with them. You can send them is for repair, and won't cost much. I also have the springs but would have to check the pound and measure the length. I think their 12".
Here's their website-
Aldan Eagle Shock Absorbers | Carson California | All Parts Made In America
Good information-
Spring Rate Guidelines for Street Rods
Front Rear (lbs./in. )
4 cylinder, v-6 T-bucket, track T 300 160
V-8 (small block) T-bucket, V-6 hiboy roadster 350 180
’29 -’32 full fender coupes, “A” sedans (small block) 400 200
‘32 - ’34 sedans, ’35 - ’36 coupes (small block) 400 250
‘35 and up sedans, ’37-’40 coupes (small block) 400 300
Street Rods with big block V8 450# -500# for front shocks
Color Codes: w/white r/red b/blue y/yellow g/green
6 Inch 8 Inch 9 Inch 10 Inch 12 inch
350# y/r 180# g 100# w/g 80# w/g/r 100# w/g
450# w/r 250# b 200# w 120# y/g 120# y/g
550# y/b 300# y 220# r 140# r/g 140# r/g
650# b/w/y 350# y/r 250# b 160# b/g 160# b/g
750# b/w/g 400# b/r 300# y 180# g 180# g
450# w/r 350# y/r 200# w 220# r
500# r/w/b 400# b/r 220# r 250# b
550# y/b 450# w/r 250# b 300# y
600# b/w 500# r/w/b 300# y 350# y/r
650# b/w/y 550# y/b 350# y/r 400# b/r
700# y/w 600# b/w 400# b/r
650# b/w/y 450# w/r
700# y/w 500# r/w/b
550# y/b
600# b/w
650# b/w/y
700# y/w