I tripped over one at the junkyard today. I've seen a lot of this type on motor homes. I can only assume GM used these because iron cracks too easy at high temperatures.

http://www.cfm-tech.com/ USED TO have a lot of good information. It seems, as of two or so weeks ago, the site has been down.
I know the '92 uses different injectors than '94-'95, and that a 94-95...

You're going to swap manifolds for headers so then you'll have glowing red headers.
On my '92 454 I have headers to dual 3" exhaust all the way back to the bumpers. What I said before about GM...

Why is it a problem now you ask. All those other parts you replaced weren't a problem at some point either. You used it, use creates wear, use causes things to fail. Why is your engine oil black when...

What you did only tests the vacuum diaphram. The problem mentioned is the exhaust gas pressure opening the valve.

My '92 dually used to cruise with the headers glowing, I think the reason why GM...