You are a 6502 fan. You like the idea of a modular approach to building retro hardware e.g. a modern S-100 bus for retro 8-bit computers. You have been looking at the RC2014 community from the outside but don't want to learn Z80 programming (and hardware). This is just what you are looking for. The 6502 CPU Board allows you to run a 6502 CPU on an RC2014 system. You swap out the Z80 processor board, make a few wiring tweaks on the ROM and Serial I/O boards, burn a new EPROM with a 6502 Monitor/Debugger and Enhanced BASIC and voila(!) you now have a 6502-based RC2014. The item for sale includes only the PCB (printed circuit board). The electronics components are easily available from online sellers like Mouser or Jameco (in the USA). This new Revision B of the design brings out the R/W signal to pin 39 of the RC2014 bus for use with native 6502 peripherals like the 6522, 6551 or 6532. An A14 address jump allows you to invert the A14 signal so that you can run 48KB of RAM and 16KB of ROM with the RC2014 64KB RAM and Pageable ROM boards respectively.
Note that this is a hobby product and not tested for mission-critical, commercial, industrial or medical use. The 6502 CPU Board is not a beginner project. You need to have at least intermediate soldering skills along with the tools, knowledge and ability to debug digital electronics circuitry and understand 6502 assembly language.