71 Dart get 408/ Trick Flow Heads....

pittsburghracer said

That works too but at that point the threads aren’t holding anything anyway so why not just hack them off? 3/8-1 3/4 inch bolts or 3/8-1 1/4 inch bolts are common sizes doing car work but not easily found at your local stores. Luckily my local Ace Hardware store carries them but Tractor Supply doesn’t.

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I always seem to have trouble of course with the last bolt and it was due to what seems like core shift... it seems like the manifold was guiding the bolt to the flat surface of the head and not into the little bit of whole being revealed so if I taper the bolt just a little bit it could wedge in between the two and finally work its way in... But Tony could be having a completely different problem.. I'm just saying that because it's the only problem I've ever had and I do believe honestly it was on a cast iron manifold...