Zack
Turbo Marauder
Yep, the IAC was backwards. Good eye Zack!
Now that the RPM's are down, I notice that the Metco lower pulley wobbles slightly. The main pulley is perfect, so I know I didn't bend the shaft or pulley or anything. Something to worry about? Those f***ing Metco pulley bolts were unbelievably tight and hard to crank down!
You need to chase the threads before installing those bolts.
Take it off, sand down the mounting surface of the balancer, chase threads, re-install.