? bout cpp hubs

[oldno7]

I'm in the process of ordering rims hopefully this week just would like to confirm some measurments. I seen these (bore at 3 3/16, 3 inches to end of dust cap) awhile back but are a little diff then the measurments i have taken on the CPP 13" big brake kit i have, 3 1/16 th on the bore and 2 3/4 from rotor to end of dust cap. I am also going to have to replace the wheel studs that stick out 1" i dont think these will be enough for the billet specialties MAG rims im wanting. Just for reference 67 short fleet with the narrow housing and am ordering 20x8.5 w 5.25 bs and 255/40/20 also 20x10 w 4.75 bs and 295/40/20 proxes. Any help will be helpfull, it's alot of cash for a poor boy like me also has a 4/6 static drop with porterbuilt arms moser rear axles Thanks Guys