exhaust manifold sleeve nut question

[resq302]

Ok, I am in the process of repainting my exhaust manifolds since the factory coating that Year One put on them rusted through and I came across a new package of exhaust manifold sleeve nuts that have a threaded hole in the hex head part of them.  My current ones that I have on the engine now do not have these threaded holes in them.  Were the original ones supposed to have the threaded hole or be a solid hex head on the sleeve nut?  This is for a 69 Charger with a 383 HP engine.  I know 1970 models used a heat shield on the driver side manifold which would explain why there would be a threaded hole in there.  I just want to make sure that I put the correct retainers back onto the car and not have to do double the work.

Thanks in advance.

Brian

[Just 6T9 CHGR]

I have used the solid sleeves on mine

[y3chargerrt]

Brian, I have an original sleve nut with the threaded hole on the end. It is the same size (5/16 fine thread) on both ends. I have seen replacement ones that look to be 1/4 threaded on the nut end that are wrong. I don't know why they came threaded. On the 70 and up manifolds theres are bosses cast into the manifold that the heat shield bolts to. Ron

[tan top]

threaded sleve's  originally , with a hole in the end. but i think i went back with the new ones  with out holes ,can't remember for sure with out looking  , as i automatically ordered new hardware before i took the stuff a part .,but the originals came off without any issues. 

[bill440rt]

Brian,
Talk to Frank Badalson over at Roger Gibson Restorations. He'll hook you up with the correct studs. They should be open & threaded on one end, not closed up like some of the other "incorrect" repros.

[Chryco Psycho]

the solid nuts are correct until after 71 the later years had the threaded holes in the end & I believe the ones Mopar still sellls have the threaded holes in the end to work for all applications