500-ish ton mobile crane

this will be my first build post here so it better be a good one

OK so this is a rough idea of what I'm shooting for, I've been gathering parts for a few weeks now and I'm ready to start on it. the frame rails are 36 inches long and will have the cab sitting out front, 40-ish inches total. going to have the same axle lay out, lots of aluminum upgrades! and lots of time involved