I replaced front and rear springs on my '63 sbc, manual transmission, non-a/c, convertible. Used Moog 658a (409 spring) in front and 6041 (wagon spring) in rear. Front is about 1/2" above stock height, and rear is raise a few inches (which is what I was seeking). Didn't cut, or trim, or adjust/modify in any way. The ride is perfect. A least one satisfied customer to report.
Suspension is stock configuration and stock drum brakes all around.