Your part doesn't look so bad that you need to do solder repair. You might be able to polish it down to good metal and just do a standard copper,nickel and chrome. If you can't polish the pits out then put a heavy acid copper on them and buff them out that way before cu.ni.chr. Be sure and read your manuals on how to apply these coats first.
Of course pictures can be deceiving and I may not be able to see any severe pitting that may be on your part.
By the way that looks like a '68 GTX
