I have a new in box ATI harmonic balancer for LS1 Fbody steel shell A/C pulley SFI approved giving it away for 325 bucks comes with ARP balancer bolt this set up would be close to 500 bucks ut of summit of jegs....

Also have a set of stainless ARP headder studs in package like to get 50 bucks...

 

325 shipped and ill take it

 

Sold!