Is this causing my low speed vibration issue?

[64stpside]

Hi guys. Well......I took the 64 out sunday afternoon to check the brakes after i installed a new master cyl and brake lines. Stops great. My issue is when I got to about 5-10 mph, the front end started shaking. Here's what Ive done to the front end so far (64 step side,2wd). New shocks (rears too), pitman arm, rebuilt drum brakes. Tonight i'm gonna jack the control arms up and check the ball joints. What I think might be the culprit is that it has aftermarket wheels on it (10 in wide). There are no centering rings, nothing but the lug nuts to line up the wheel. I installed some aftermarket center caps off ebay (all were missing when I got the truck). The lip of the center cap is not seated in the back of the rim as there is no provision in the wheel for it to sit flush. It's not sticking out bad but I wonder if the wheel is not sitting flush against the drum, is causing the issue? Oh, I have a 1 piece drive shaft so no carrier bearing to check.
Before anyone asks if I felt a difference after I put the center caps on, the truck came home on a trailer and it's been a yr getting it going so this was my 1st real test drive.
Do you guys think hub centering rings will fix my issue or does the fact that the center caps not being flush with the back of the wheel, will still cause an issue.
Here's a link to the wheel I think are on it. They look exactly the same. It's the chrome modulars
http://www.lmctruck.com/icatalog/cbe/full.aspx?Page=70

[bpmcgee]

Did you feel a pull back and forth in the steering wheel like it might be out of alignment, or were you feeling it in your butt? If you felt it in your butt you're probably right that the wheels may not be on correctly or balanced.

B

[LVPhotos]

My rear rims didn't clear axle centers. I had to take some material off of rim to clear hub. Also if using the right lugnuts you don't need hub centric. VW was only one I needed to do that to. Check cap clearance.

[64stpside]

Originally Posted by bpmcgee

Did you feel a pull back and forth in the steering wheel like it might be out of alignment, or were you feeling it in your butt? If you felt it in your butt you're probably right that the wheels may not be on correctly or balanced.

B

I didnt feel a lot through the steering wheel

[64stpside]

Originally Posted by LVPhotos

Also if using the right lugnuts you don't need hub centric rings

I bought some acorn lugs from orileys. Their make and model specific

[bpmcgee]

Originally Posted by 64stpside

I bought some acorn lugs from orileys. Their make and model specific

Are they tapered?

B

[64stpside]

Originally Posted by bpmcgee

Are they tapered?

B

Im almost positive they are but ill double check. I cant believe i would have put them on if they were not tapered. Were the factory lug nuts not tapered?

[Wrenchbender Ret]

Those original hubs & drums come with 3 bulky rivets holding the drum to the hub. Sometimes with after market wheels, especially aluminum, the rivets will interfere with the wheel fitting flush. If so you have to knock the head off the rivets or grind a recess in the wheels.