I'm not sure I understand what you want to do. The original 6 volt 6006 *is* a sealed beam lamp, and the 12 volt equivalent 6024 and H6024 (Halogen) are also sealed beam lamps. The 6024 and H6024 are physically identical to the 6006. They fit perfectly in the original mounting and have the same configuration for the electrical contacts.
H4 bulbs and the housings they fit into are *not* sealed beam units. Many people (including myself) consider the bluish light they emit to be very annoying, and this is compounded by the fact that they are almost never aimed properly.
If you're after something that works well, I'd say go with the H6024 Halogen lamps, which are a bolt-in replacement for the originals.
Joe
