[HawgRyder]

If that were the only reason...you could use allen head bolts (small heads).
If you have bolts...and they go in and out several times...you will need to repair the holes on a regular basis.
I have wondered in the past why not use stainless steel studs??
The are strong enough for headers....will not corrode...and if you use brass nuts, they will not seize.
Bob