for '67 326. Have a customer at work doing a reassembly of this and is looking for the type(stud/bolt)and locations of the head bolts..says he has one with a threaded hole in the center of one. Would the '68 350 be the same. Pics would be helpful...if '68 is the same I can snap a couple of pics of mine...not sure never had a 326, nor rebuilt one.

I don't think any heads had threaded bolt holes. On some, the center exhaust bolt has a threaded top for securing the heat shroud....think that's what that was for.

For proper lengths, place all the bolts in heads where each has the same length on the mating surface side. All will have same length threading into block.

Thanks Banshee, that's the info I was looking for.