I am in the process of using a sedan cowl on a 57 convertible. I have done this on a 56 and it did fine. However, vendors show that 57 convertibles and 57 sedans have different Door Jamb to "A" Pillar Reinforcements. When comparing the two there is a slight difference in the two parts but the Cowl to Floor Brace seems to fit well against the 57 sedan "A" Pillar Reinforcement As a matter of fact the convertible replacement part is the same as used on all 55' and 56's and it is different from the original 57 convertible part as best I can tell. So, is there a problem with leaving the sedan "A" Pillar Reinforcement in place and installing the Cowl to Floor Brace to it and to the floor?