I went to multiple stores with one of my intake bolts to try and figure out the threads. I needed to but a tap and die. Menard's a bust. I went to ACE hardware and thought I figured it out but I want to make sure before I destroy the head. I did match up a nut and threaded it on the bolt. It was a 7/16 14NC I bought both die and tap. I'm trying to tgead the bolt in but then it gets stuck.... Before I destroy it ... Is that the correct bolt size for the intake on a 455? Thanks.
Thanks....this is a later engine and I pulled out an old bolt and it matched the used ARP replacements I bought from a member. I just want to make sure the threads are correct on the tap and die I bought. I'm thinking it is correct.
any idea what the lenghts are for a 67 gs400/ like to buy a kit off of Toddsgs but not sure what i need. anyone? Im seeing 3/8- 16 is this correct thanks johnny