Revival Model

I'm about to begin a Revival kit (1/20 scale) of the Ferrari D-50 but I have a few questions about its assembly. While this will be the first Revival kit I've attempted, I'm very familiar with other kits. So far I have examined the parts & instructions. While there are no suggestions for paint colors, I've done some research into the D-50 & have some color photos for reference. My fundamental question though is, for others who've been successful with Revival kits, what is the preferred method of assembling the cast metal engine parts. Are these to be glued together somehow? Joining the different materials, in some cases, seems to present a unique problem. Your suggestions & advice are appreciated.