wheels? size wheels will lay frame?

i have a 1987 mighty max/d50 i want to put 18inch wheels on there but i cant figure out what offset will fit inside the fenders. due to having 6 lugs i cant really find to many options unless i get a custom billet wheel but thats too much money. i might have to flare my fenders or pull them out i understand that but for now i just wanted something that would keep all that to a min.18x?off set?

Just look through the profiles, there will be some guys running 18's there.

I'm sorry. I am the wrong guy to ask about that. I don't have much vehicle specific information.

I am building a mighty max on 20's right now. I can tell you that we are going to be narrowing the suspension to allow for turning. That is with a 20x7.5 with a 38mm offset and a 5 lug swap.

what did you do with your prop valve on the rear and how did you set up the front bags?