Corvette Suspension in 1966

[chenders246]

I've been searching but couldn't find any info. I want to put a C4 (85-87) ifs and irs under my 66 C20. There are tons of companies that make kits for the 54-59 and the same ones make kits for the 67-72. So the 60-66 must be the bastard, step-child. Can the Flat Out kits be used in the 66? How different are the frames (width or rails, width hub to hub of front, rear etc.) Thanks in advance for your many responses, and if there's already a thread on please direct me.