Oh, you drilled the wheels?
Do you have a photo of that?
Id be interested in how much meat is left in the wheel and what size the center bore is.
I tried to drill the hub and bought a $20 drill bit that only got me through one hole in the hub. For the record, IRWIN tools are now made in China like everything else. So I opted for 8 holes in aluminum instead of 16 in steel.
The center bore was about 78mm on the rims. I ground the tabs off of the hubs instead of boring out the center hole on the rims. Machine shop wanted $150 to increase the bore. I ran away from there. I'm Poor. I probably should have shopped around a bit. The mounting flange of the rim is very thick, lots of meat.
End is result is no vibrations at all. Also, I added about 12.5 lbs at each corner from the 13" steelies with 155sr13's. Doesn't quite leave the line the same, but won't matter once my frankenmotor is in there.