I have a 54 3600 and GM changed the frame and bed design for 1954, and no longer use wooden blocks , same for 55.1 , 55.2 . There are 8, 1/4 " thick rubber pads used in the eight bed to frame bolt locations. You can get them from several sources, Mar-K has them, their p/n 120181 , $13.00 for set of 8.

Ron - - Dusty53
1954 Chevy 3604
In the Gallery Forum
"You can't dance with the Devil and then wonder why you're still in Hell."
"They will forget what you've said, and they will forget what you have done but they will never forget the way you made them feel."