Opinions on 67 vs.68 fenders.

[WB72]

Out of nessesity, a rotting cab, I am changing out my 72 cab with a 67 SBW cab. The PO of the cab, also had new in box front fenders as well as SWB bed sides for that year. So I purchased them as well as a bunch of other items. Anyway, I noticed that one front fender and one bed side are 67 (no signal light) and one 68 (with signal light). So, I plan to either graft in a patch panel or a signal light.

I ask of you, in your opinion, should I fill the holes, or graft in signals?

Plans are to have it slammed on air ride if that makes a differance.