Thanks for the last couple of messages, I will check those out tonight.
So far I could not detect any broken engine mounts or sticking components. I DID replace the vacuum secondary spring before this all happened so will triple check that and the worn or sticking cam is a possibility. Carb is new but who knows, could be that.
Added 2 more helper springs to pull the throttle shut, but pretty sure the throttle was off while it was revving. Also put in the 3000rpm chip into the MSD 6Al to avoid blowing the engine.
I have never floored the throttle before on the freeway so could be a big vacuum issue there?