1995 Pontiac Firebird idles extremely high on startup

I replaced my head gaskets on my 95 firebird 3.4l. Now when I start the car up it jumps up to 4000 rpms. I made sure all the electrical connections were correct and I played with the tps, iac and the o2 sensors and nothing changed. There isnt many vacuum lines on the car and ive checked those too. I was wondering if on this model there is a groud strap located on the cylinder head towards the rear of the motor or if anyone knows why this is happening? Thanks