Did '57 Plymouth use oval type brakeboosters too? According to my shop books '57-58 (PLY) used only bellows type, '57 DeSoto oval and '60 DeSoto used them both. I have oval type for my '57 Plymouth, but is that correct - can I use it? Jan Finland '57 DeSoto Diplomat '57 Plymouth Fury '60 DeSoto Adventurer |