the workmanship on the BBK's is horrible on both sides i had to flatten the flanges because they were bowed a good 10 degrees in the middle of the flange.

 

i have the bbk header gasket and bbk bolts. if my bolts start coming loose can i just get locking header nuts?

 

i just used the jam-nut technique because i didnt want to risk the chance of breaking the stud in the block trying to get the studs out. also, you can tighten nuts on studs more than bolts, so i just used the two nuts one over the other.