Exhaust Manifold Question

[FoxHound]

Hey all,

I've got a 72 Blazer with a stock 350 sb with stock exhaust. Last night I was changing out the donut gaskets that sit between the exhaust pipes and the bottom of the exhaust manifolds. Got 5 of the nuts off, no problem. The last one decided to seize up. Long story short, the stud sheared off and now I need a new manifold. I'd like to just find one at a junkyard or a pick and pull lot. So, my question is, what range of years did the factory manifolds bolt directly onto my motor? Can I use one from 73-87 truck running a 350? I really doubt I'll find a 72 GM truck with a 350 sitting at the yard, never had that much luck before. Any help would be great, thanks. Oh, and it's a 4wd with A/C. I understand there's a difference.

[BB72CHEVKT]

If you take the manifold off and heat the stud with a torch you should be able to get it out and then you can install a new stud.

[FoxHound]

I also realize now I probly should've posted this under engine and drivetrain...sorry.

[FoxHound]

BB72CHEVKT I didn't even think of that, thanks. I'll give it a shot.Definitely sounds like the cheapest way to go

[cdowns]

or you can drill and retap the hole

[AirSpeed]

I just replaced the exhaust on my 72 and broke two studs off the passenger side. I was easily able to drill out the old studs and re tap the threads without removing the manifold. I tried an easy out with no luck. You have to be a pretty good aim to get the bit in the center, I started with a 1/8th" bit and went up to a 3/8" bit. Then I used a 3/8" coarse tap to clean out the threads. If you screw up the hole you can always go up a size.
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[Dunenutt]

You can also Helicoil the hole, so it's the same size again.

It's not junk yet