Originally Posted by Hotrod Lincoln
The lesson to be learned here is don't try to remove throttle plates from the shaft unless there's a good reason to do so. If you do, drill the peened end of the screw away and use new screws to reinstall the throttle plates. You can loosen the screws slightly and tap on the plates to make sure they're centered in the bore, then retighten the screws but don't dismantle things all the way unless you've got new screws on hand.
Jerry
THIS!

1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY Gallery
Video of the 261 running

1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration