[Roger V]

I found the spring thickness info that Eaton Detroit told me several years ago. They said they had a copy of the original Ford blueprint.

Bottom leaf .180"
Next five leaves .176"
Top four leaves .204"

Their repro had all leaves .204" which had to give a very stiff ride compared to original.

Most people think a few thousandths of an inch in thickness would not make much difference. I was a quality control supervisor at a Ford manufacturing plant that made springs though coil not leaf. Size has the same effect so load and rate can differ greatly. Therefore, unless you want to pay for a custom-made spring, repros likely are going to have a harsher ride.