I'm sure you want a simple swap? I think the CB900 front end will work with a Comstar already in place? I made up my own 2.15" x 18" original pattern Comstar. I think they have the best cleanest look. Hope this clicks to enlarge?
Mine is also 1978, no I didn't make the adapter. Once you go to the spin on filter adapter you'll never go back it's nice. Made by the Randak (sp) guy. When I made my headers I made sure I could have room for the spin-on filter.50gary
Not to steal the thread but I just noticed you have a spin on oil filter!
Was that stock or was it something you did to it?
Mine is a 1978 and it has the metal housing with the filter inside.