he drilled out the broken stud and put a piece of allthread with a nut on either side of the flanges.
In general, "allthread" is the shiitiest, weakest steel on Earth.
Kinda tells me he used "allthread" because he drilled off-center and screwed-up the female threads in the manifold, so he couldn't put a new stud in place.
When that was me, I used long bolts, rather than allthread and a nut on both ends. The bolt is much better steel than "allthread".
Yeah im pretty sure the donuts are shot too. Should i just go ahead and put shorty headers on or would that require egr modifications (or delete)?
This is a TBI, not a Vortec...right?
TBI doesn't need anything special to keep the EGR functional. Vortec does. TBI might need AIR fittings, though. My '88 K1500 5.7L has an AIR pump, with fittings on both shorty headers to supply air to the exhaust stream. If you have an AIR pump, you'll need headers with AIR fittings. Otherwise, no.
Be sure to clean-out all the remains of the donuts. It's no fun. I burnt-up a pair of donuts on my Edelbrock Tubular Exhaust System (TES) (Shorty headers) because the "stainless steel" headers had mild-steel flanges, and the flanges rusted to death. I had to install new flanges along with the new donuts.
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The bolts I had on hand are too long, so there's some larger nuts being used as spacers.
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