Headers, Sure Grip

Ok...first question. I know the A body exhaust kit will work on the fmj platform, what about headers? I know a mini starter is coming regardless, just wondering because its easier for men to pick up a deal on used a body headers, than fmjs.

Secondly, I've got a police rear..2.9 gear, but its not a Sure Grip. I'd like to add SG, where can I look so I'm not breaking the bank on that either?

Thanks
Author: brotherGood