Originally Posted by low_and_slow
I am going to use the intake manifold from 305 on a 350. I was suggested that I remove the aluminum section from the underside and clean out the built up crud. This has a couple of rivets holding it on. Is this worth the extra work?
Sure. There will be all sorts of carbon built up under there. The tin/steel pan is held on usually by rivets that have a twist on them. If you use a thin sharp chisel to get them started they can be pried out fairly easily.
After cleaning, use carb spray cleaner to degrease the rivet holes and rivets and use loctite to reinstall them, or tap the holes for small machine screws. If the rivets are a little loose from being removed previously or from removing them this time you can use a small piece of copper wire in the hole to wedge the rivet tighter along w/the loctite when you tap it back down.