: And there was a later iteration which is not allowed for the class?

SA: Right. It was called the 10-liter motor. It was made to be 600 cubic inches. A totally different motor.

: And the cubic inch displacement is 426 on this combination?

SA: Uhh hmm.

: What do you think is going to happen with this combination?

SA: In my assessment, it’s directly in between the 392 and the 426. Cylinder-head size, chamber size, valve size: It’s right in the middle. The 392 is a very good torque-ing motor. the 426 is a very good top-end motor. This is in the middle of the two of them. It should be right in the middle of the whole package.

: Can you tell me what you’ve done to strengthen anything happening with the heads?

SA: Extra bolts in the valley and on other outer edge of the head. In the oil system, we drilled the front main. We feed oil in both ends of the block. Originally, it was singularly in the rear. Beyond that, we did a lot of work on the manifold: Changed the air distribution—shaped the manifold in the back to try and get the air better. We are running very even-up nozzle sizes, probably closer than any 426 that’s running right now.

: The tinkering that you’re describing is not uncommon for the entire circuit. It’s what people would be doing with an elephant motor.

SA: Yes.