Which rear springs and shocks?

I installed the 002 and 003 springs on my 68 Dart GTS 340 and found all the front and rear mounts were rusted away. I replaced them with pieces I bought from Laysons. Be sure to check yours. The biggest tire I could get under my car was a 235/60/15. Be sure to check the back spacing on the wheels you have or want to buy. I saw a 70 Dart with 255 on the rear using rally wheels. Jeff