Hellllooooo bomber nation. First post but have been reading here for sometime now. Anyway I'm in the market for a bomber and have 2 I'm looking at currently. Both 2003 Cummins. How can I tell ( if possible) whether its a 305/555 model. Any and all help will be appreciated.

That is all.

 

Should sa on the driver side of the valve cover. There is a specs sticker there. There was also a CA model that was 235/450.