There's something wrong W/those 3-view drawings as the 27' length is longer than the 31'9" WS.

I scaled the 27' length to the cowl diameter & I come up W/a 10.31" cowl diameter 1:4.76 scale. (31.75'/6.66') just enough to clear the 450R3.

That is still up to speculation.

We need either the actual Jim Pepino 80" Hughes H-1 cowl diameter of accurate 3-view drawings.