Want to buy leaf springs, have questions
 

I'm looking to buy a set of 2-3" drop springs for the rear (going with 2" drop spindles and maybe 1" drop springs up front). I have a 1978 Trans Am, and I have removed so much weight, the car sits high (they were too high from the factory to begin with). I would like to go with fiberglass mainly for durability and weight reduction, but have a few questions:

1. Who makes a good fiberglass rear spring in the area of 220 lbs/inch?
2. Are fiberglass springs more susceptible to wheel hop?
3. If wheel hop is an issue, will something like Caltracks cure the problem?
4. How much lighter are fiberglass springs?

I heard there is a company in Maryland making some high quality fiberglass leaf springs. Is anyone familiar with this company?

1. Hyperco & Flex-A-Form

2. ?
3. ?

4. About 70% lighter according to Hyperco.