Hub bore throughout models and years

So ivw been piecing together parts to dually swap my 75 gmc k15, I have a dana 70HD rear to put in, as well as some 8 lug hubs from a 1989 V2500 suburban, I know im running arrowcraft adapters up front, however just for screwing around, I found out that both the 8 lug front hubs, along with a 1997 14 bolt ff are a 4.6" hub bore, whereas the fana 70 is a 4.56, I was thinking all GM 8 lugs until 2001 or 2 were the 8x6.5? I will probably make a special note witharrowcraft when i go to order spacers but it got me curious

PFA of local range cat that likes squarebodys

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