The first few production runs of the C64 came with 50v caps (more than likely due to parts availability). Later runs (and their schematics) use 25v caps. Our kits ship with 25v caps.
Cap - Value - Rating - Type
C8 - 10uf - 25v - Radial
C12 - 10uf - 25v - Radial (May be ceramic)
C13 - 10uf - 25v - Radial
C14 - 10uf - 25v - Radial
C15 - 10uf - 25v - Radial
C17 - 10uf - 25v - Radial
C19 - 2200uF - 16v - Axial
C24 - 10uf - 25v - Radial
C34 - 10uf - 25v - Radial
C57 - 10uf - 25v - Radial
C62 - 10uf - 25v - Radial
C65 - 10uf - 25v - Radial
C88 - 1000uF - 16v - Axial (Some use 470uf. We ship with 1000uf which is safe to use)
C90 - 470uF - 25v - Axial
C91 - 100uF - 16v - Radial
C94 - 10uf - 25v - Radial
C102 - 10uf - 25v - Radial
C107 - 10uf - 25v - Radial (Inside VIC-II shielded area)
C108 - 10uf - 25v - Radial (Inside VIC-II shielded area)
C38 - 4.7nf - * - Ceramic
* Replace the 51pf cap with a 4.7nf cap to restore soft-touch RESTORE key function. This is included in our kit.