Need Tires and Rims - Also First Post w/Picture

[SWFlyer]

I picked up this 1963 C10 last year in Manti, UT. Had a guy up there put the trim on and finish the bed, story of the truck later. Finally got it home to CA a couple weeks ago and the right front tire tread peeled off so I need to find some cheap temporary tires on rims. Are all 6 hole Chevy rims the same fit? Can I find some late model stuff on Craigs list to use for now or are they a different fit?

Also, it has brand new 2" lowering springs on it that I do not like at all. Need help finding stock springs and will sell or trade these.