I'd reccomend Stage 8 locking header bolts...I know they have them on ws6project.com
theyre like $45 and they work awesome-It's not uncommon for these darn bolt to rattle out and become loose, obviously not good for your gaskets.
I bought my car with bbk shorties on it, and within a few months i had a bad exhaust leak between the cylinder head and the header...one of the bolts acutally broke off into the cylinder head

let me tell ya, gettin that bugger out of there wasnt fun....but i took them all out, replaced the gaskets and put in those locking header bolts...
Anyway...look into those locking header bolts, they work awesome!
Mine said "Ford SVO"(-yes SVO, not SVT) on the package they came in, but theyre pretty much universal.