Hotchkis (sp?) makes some. I've got a set on my car, and have had no problems. I think I got them from Classic Industries or one of the other main restoration parts companies.
Max, I think Hotchkiss is correct , and Andy here in Houston, i think has those on his 67....not sure if different... try him/...I`ll pm you his email..
A lot more choices then one part number. I'm running a 2" drop on my 68 Firebird currently. (1" in the rear using their leafs)
They will ask you questions like: What engine are you running?, Whether you have PS, PB or AC, what kind of ride quality do you want, etc. They've purchased the stock blueprints for our Firebirds from GM so they can do the stock equivalent also.
Drew. I've thought about that, but 1 of my springs is in pretty bad shape and I'm not really sure of how to go about cutting them and assuring that everything would be even.
I put the Hotchkiss 2" drop coils in the front and a 1.5" drop in the back. The car sits really nice and looks good, but I have some shock tuning in my near future. Those springs paired up with the KYB gas-adjust shocks is way too stiff. It rides like a go-kart. The rear springs were stiff to begin with. I could barely bounce the rear end w/o the shock. With the shock installed, I can't hardly budge it. The front isn't much better. I installed the top mount of the shock and needed a jack to compress it to mount the bottom.
But the stance is perfect. I am running 245/50 R17 in the rear and 225/50 R17 in the front.
I know that washing and waxing my car with the present condtion of my paint is like polishing a turd.....but it's my turd and I want it polished!