I'm looking for a nice set, or even individual bolts with the "5" marking on the heads, that were used on the intake manifold of the '67 GT500 C7ZX intake.
PM me if you have anything.
Also need the bell to block and transmission to bell bolts.
Did you check with AMK, also NPD sells AMK parts,
https://www.amkproducts.com/i-kits/ford/?year_=1967&model=Mustang&category=Engine%20-%20352%2F390%2F428
mmm, seems what they are showing doesn't have the "5" on the head.
AMK is not showing them with the 5 markings. They have substituted another head marking. Advice here was "5" is the original marking.
I have not tried NPD
I have a couple of "5" in 3/8 fine thread. I have no idea what they are for. Fine threads generally are not used on engine assemblies.
So I thought I'd try here and possibly scrape up a set. No hurry. I need more parts to keep me in the shop, busy and out of the snow.
Now even Marti is shut down. "Best laid plans of mice and men" I suppose?