Another Magnum 408 build!

gregsdart said
I wouldn't be afraid to put a 4 inch crank in a 318 with the heads you have. It will just be a torque animal, and make more hp than the 318 for sure despite the poor heads.

With the 4 inch crank, you can run a rather tight converter and still get decent performance. Not so with a 318,,,,,,,

I certainly won’t argue that!
My comment comes from a “Maximizing the Combo” point of view.

And Greg makes an excellent point. As I see it, “Just build it!” As well you can copy his build. No shame there!