5.9 magnum header bolts

Has anyone drilled the 5.9 magnum heads out to receive 3/8" header bolts??? My heads are off a 97 engine and came with 5/16" bolts----my headers came with 3/8" bolts which makes a lot better sense---so I am hoping to drill the heads an tap for 3/8" thread----just wondering if other people have done this successfully?????