This is posted on the "parts for sale" forum as well...
I recently bought heads off a fellow cz28.com member and these springs came on the heads. They have about 2500 miles on them and are in perfect shape. Everything that is needed to have these springs set up and ready to go is included. I only swapped them because I'm running a cam that requires more lift than these springs can handle (they are good to .550" lift) and I'm running the xe230/236 with 1.6's ( .544/.555).

Here is a description from thunderracing:
For LT1 Engines with Aluminum heads, Thunder Racing has several spring packages available. For milder combinations that utilize a smaller camshaft and are limited to no more than .550 lift, we have a spring and valve lock package from ISKY that utilizes the stock retainers. For proper installation, new ID spring locators & valve stem seals are required. This package works very well with self-aligning rockers because they are a stock diameter spring, and is an excellent upgrade if you don't want to do any machining on your heads.

Here are a few pics. Everything is there.
www.fbody.com/members/ltlhomer/springs1.jpg
www.fbody.com/members/ltlhomer/springs2.jpg
(copy and paste to new window to see pics)

I'd like to get $50 shipped for everything. I think that's fair since brand new springs are $90 plus you'll need locators at least which are like $40 from what I've seen on thunderracing. Drop me an email at LTLHOMER@aol.com

 

What kind of retainers are they? Stock? Steven

 

I imagine they are stock retainers since they are supposed to work with them but I will email the guy I bought them from for sure and post back here once I know for certain.

 

I emailed the guy who had them before me and he said the spring setup (along with everything else) was assembled at CNC heads in Florida and that he doubted they would use stock retainers, locks and all on a $1500 set of heads. They didn't use stock of anything else, so we think they are aftermarket retainers as well. If anyone knows a way to find out for sure, let me know and I'd be glad to find that out for you all.

 

if you still have them ill take them.