Hey, thanks for the welcome. It is going on. I found all correct seal kits, mastercylinder and so on.
I think, here in this forum is also the owner of the rebuilt 69 GP Nascar in the Pepsi design. Would be nice to find out, which wheel size and backspacing he installed on his car.
I will order soon some Basset Nascar rims and have to find out, if the 15x10 with 4" backspacing will fit or if he is using different backspacing front and rear.