We're waiting on a custom set of hub centric spacers but still have not received them. The car needs 12-15mm of clearance in the front. Should I be concerned about running standard, non-hub centric spacers or skip this weekend and wait for the proper product?

I am using a couple wheel studs on my fronts on the track, when I run my wide tars..this makes mounting a piece of cake, instead of back breaking frustration. Bob

I'd skip and wait, especially if it's track duty. Wouldn't want to shear wheel studs or have something loosen, but more than likely you'll feel nothing, or at most a little out of balance.

Summary - you should be fine but why chance it...

You did get extended wheel studs if your running 12-15mm, right?

im running normal wheel spacers that i made from aluminum with no problems

i also have the long wheel studs from turner

I'm running the 90mm (over all) bullet nose studs.