Well Guys Here I Go: 82 12a Header Straight Pipe To The Back No Rats Nest, Problem Vibration At 50mph And Up And 80mph And Down In Gear And In Netrual. Now The Wheels Do Not Vibrate And I Just Had An Alligment All The Way Around. Check Trans Mount Seems To Be Ok. The Whole Inside Vibrates Dash, Center Consol, Shift But Not The Steering Wheel Any Ideas Thanks

 

Sorry Forgot To Mention I Had New Tires Mounted And Balanced Prior To The Alligment

 

Driveshaft.

 

make sure your u-joints aren't sloppy or seized.

 

+1

 

And for future reference JIM82RX7:

Please Don't Type Every Word With A Capital Letter. It Makes It Really Difficult To Read Your Posts.