Denny,

I'll also be in the market soon for my 1965 Chevrolet 1/2 ton pickup, and my choices are down to Eaton, Jim Carter, and JC Whitney.

I have bought from:

Eaton - when their prices were lowest (10 years ago). Also, you have to ask for the period-correct "spring binders" (otherwise they might use banding strap around a small piece of rubber.

Jim Carter - good price - good springs

I have had no experience buying springs from JC Whitney and hope someone with personal experience will respond.

Tim