Where to buy Upgraded Springs For 185 AFR's(can't find them anywhere

I take it you are using a Hyd. Roller Cam. I'd suggest going with Comp's new Bee Hive Springs (I use them on my AFR 205 equipped 408) They do make a bee hive spring rated up to .600, although I'm at work right now so I can't get you the PN. Phone Comp and they will help you out. With the BeeHives you will need to get the locator's, which require a bit of grinding off the O.D. to fit in the spring pocket (Nothing Major) and you will need to get retainer's. If you got cash get the titanium retainers. The Bee Hive's are ultra light and improve the RPM capabilty of your combo (because of there bee hive shaped design) which is a hard thing to do with a Hyd. Roller cam. Dyno Test's have been proven that these spring's work, and I know for a fact that they work since I'm currently using them.