OK I called Extrude hone and the place that is set up to do intakes is in Pittsburg. The guy said it takes 2 weeks and it would be 450.00 for each fuel injection lower manifiold He said they would remove between 30 to 50 thousands of material. Flow would increase and he said avg HP goes up 10 HP.. I will pass at 900.00 for 2 lower manifolds. I can get more than 10 hp for 450.00 each motor. Oh well it was a good idea in theory.

Payment plan seems like the best option...

I worked in an engine airflow facility for many years. The reason Extrude hone has never caught on is that is DOES NOT WORK. Well, ok, yes it does take out material, but the problem is, it takes out material in precisely the WRONG places.

Cylinder head or intake manifold porting is complicated work. It's not just a matter of hogging out material. The process takes out the most material were the sludge is moving fastest, and very little where it is moving slow. Often this is the opposite of what you want to have happen. (that's a simplified explaination, the more technically correct explaination gets into stuff like Reynolds Number and would require me to break out my college fluids text and would put everyone to sleep)

I recall a coworker tested several heads or manifolds that had the process done to them and they almost always lost flow or the gain was minor in comparison to a properly ported version