[davepl]

Not mine, and not even a GM, but for wild induction you have to give some credit to Chrysler in the 60s for the "Super Commando Cross Ram" setup. Though I bet the TPI setup above isn't that far removed from this, they curve and fold under, whereas these are unwrapped overtop. Could be the same length!

Looking it up, the TPI is 25.5 inches including the 6 inches in the cylinder head, so 19 outside the head. Doesn't seem that far off of this...