I never did figure out why they cast it with those two slots there. Yes, this is the same as all 3 of mine. I cut mine down to get better low end response. I don't race my car, so I wanted all the torque I could get for street driving.

I'll watch it, too. Just as an idea, it should go for between $150 and $200. Any more than that is just too much. If you plan to run your heads with the exhaust cross-over open, make sure you get a good picture of the bottom of the manifold before you bid on it. Look for any cracks around the heat passage. The Edelbrock P65 is notorious for them; I've never seen one on an Offy - yet.

Good luck.