After reading about the miraculous ported lower intake manifold, I decided to make one for the LeSabre. I ordered one off of Ebay that looked pretty good for $50 shipped. According to them, it came off a 99 Bonneville, mileage not stated. This looks to be in decent shape, with none of the pitting seen in some other LIM photos around here. And the casting looks to be pretty good to my fairly untrained eyes, again not like some other LIM photos around.
Opinions and advice appreciated. I've bookmarked about 6 threads that really get into the process and tools needed. I have the Dremel and carbide bit, and will pick up some sanding drums before starting. And a good set of calipers for measuring progress.
This is something I'm going to pick at in my spare time, since I still have lots of other stuff to do and want a nice project to pick up as I please.
Now for the photos of the LIM to be ported:
The front-side ports
An example of the casting done on the manifold
One of the runners. All of them are fairly lacking in carbon.
That'* it for now. I will post progress with the porting and polishing as time permits, which isn't much currently.
Any advice and encouragement will be greatly appreciated!