My 67 c20 Panel truck

[67c20panel]

Picked this up for 800 bucks on craigslist. Figured ya'll would like to see it, and hopefully help me answer some questions. Seeing as it's a C20 and from what I gathered kinda rare only 940 build I believe, I'd like to keep it a C20 so that brings up wheel choice. What I'm looking at now is the 2003> Dodge 17 steel wheel which Chevy center caps or the 17.5 rims that I have(I realize this greatly limits tire choice) Then convert to disc with the C20 lowering spindles. I'd like to keep the stock 250 six and back it up with either a 200r4 or 700r4.

So questions: Which axle is that I thought it was dana 60 but it doesn't look like my fords 60? What hubcaps originally came on the 17.5 rims? How hard is it to put a removable backseat into a panel? Has anybody put a finished interior into this vintage and maybe have pictures?