Looking for a quality 4" rear drop spring

[AcampoDave]

I used to get my springs from Early Classic Enterprises and they were always great, spot on, exactly as advertised. Now I'm helping a friend try to find a true 4" drop rear spring and reviews of competitive brands are all over the map. CPP has a "heavy-duty and a standard duty, Mcgaughys springs are said to be "soft and produce lower than desired drops and LMC....is LMC...enough said. Anybody have a recommendation for a true 4" drop rear spring like ECE used to sell?
https://www.performanceonline.com/19...-Coil-Springs/ what about these, at least we know they are made in USA .