By Continental Roof do you mean the clear roof ? I remember seeing this style on the major Kustoms of the day and it would allow a good display of the interior. No idea just how far your wanting to go, but the AMT '57 Chevy kit used to have some interesting front and rear treatments, that should fit, as an option. The AMT '55 Chevrolet "Street Machine" kit has some tail light and bumper options also. The Monogram '55 Chevy 2in1 Hardtop has some similar options plus lowered suspension option.