Reply to "Why the habit of cutting notches in the plenum dividers of dual plane intake manifolds began"

Rob, I am not suggesting any such thing.

What I am saying is the the Blue Thunder is a reproduction manifold and is in plenty of supply.

The Shelby script manifold is long out of production and is likely a good deal more valuable than the Blue Thunder.

To me logically a non-modified Shelby manifold is going to be worth a lot more than a modified one?

In addition to that, there seems to be pretty good data from recent dyno tests that the BT doesn't come anywhere near the power of the Holley Track Dominator manifold, ported or unported.

I personally have run the original Shelby version of that manifold. I went through three of them back when they were pretty cheap and easy to get used.

I tried it against the Ford aluminum stock manifold and the Edelbrock Torker.

The Edelbrock ran circles around both.

Porting out the BT to me is just a waist of time and money. Been there...done that.

Start with something that is proven to work and try and get more out of that, but you don't need to do anything to the Holley. In fact, you can probably just make it worse?

There is a saying that you can't get blood from a stone. If you insist, no one will try to stop you. To me, life is short. I hate wasting time and energy trying to reinvent the wheel. That is just pointless to me. Other opinions vary.