No the pads are not the same. The '53 rests on a hinged pad and the holes in the springs are further forward than the holes in the '55 first springs. Ideally, you need '55 first springs. However I have read of people drilling new holes in the earlier springs. Never tried it myself.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.