Hello, I am restoring a 1981 gmc k2500 with a 350 in it. I am going to do work on the engine, but I don't have a whole lot of experience with engines, only body work. My current issue is the exhaust manifolds appear to have some sort of vacuum lines coming from them. I asked around and the only answer that I got was that they could be something dealing with some sort of anti smog/emissions system. I was told that "sometimes" the whole system can be yanked right out with little to no effect on the engine. This would make it much more easy and affordable to get performance headers on it. On the other hand, I was told that "sometimes" removal of the smog-system causes the engine to run like garbage.
I would imagine this would be dealing with the vacuum of the motor, and I would guess what type of carb the engine had would play a role. Like I said, I don't know a lot about whats going on under the hood, but this vehicle is how I am going to learn. What I do know that it is carbureted and not fuel injected.
Any help on this issue would be awesome!
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