Getting ready to rebuild the front end,bought a full kit from Performance Suspension Components but now looking for front springs. I'm an old SCCA club racer so I thought i'd try to make the old stove bolt handle well to. Any one have any insite on some good performance springs? I plan on using Koni adjustable shocks and would like a good progresive rate with about 1 inch to 1 1/2 inch drop.

i think eaton and/or detroit make 'made to order' springs, but i dont know if they are variable rate. i have heard the name hotchkiss thrown around a bit on the cramarotech site.
i think global west makes some interesting high performance type stuff too. possibly what you are looking for.

is progressive rate like variable rate?
all i know is if i chop OE springs, it's lower and stiffer. rides and handles more like i like.

you may be interested in reading david pozzi's firstgen suspension: link

Hotchkis makes a 1 1/2 or 2 inch drop spring for Firebirds. They would probably be your best bet.

Drew can also tell you about Eaton Detroit 1-1/2 drop rear springs.

Q