Clutch springs were broken and you reinstalled it? I know you don't want to hear it but hitting 9s in a six speed means you will break plenty of shit along the way or spend a hefty price getting nothing but the best parts. The Monster stage three is rated at 700 and judging by your sig mph you have at least that.
I broke my DS the one time I went to the track and now my clutch is slipping. I'd get mad but that's the cost sometimes of having a high hp 6sp car imop.
I could go alot faster with an auto and save money along the way but for me thats not as much fun. I have a monster 5 sitting in the garage as my backup and I'll install it but I don't expect her to hold my power for very long even thou they are rated for 825. There's a reason twins and triples are made. Good luck in your quest for 9s