i have a cracked exhaust manifold and i was wondering if the studs the manifold goes over that at in the block do they screw in or press in? theyre pretty thrashed and was going to replace them when i did the manifolds.

 

mine are bolts in all three i own 2 - 4.3s and 1- 2.8 - so my guess is threaded

 

ok cool thanks man!