ORIGINAL: SrTelemaster150
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.
Mystery solved!
Those 3-views are correct, FOR THE 25' WS LANDPLANE WORLD SPEED RECORD H-1 that had a 25' wingspan. The 31'9" WS was for the transcontinental speed record version
So, is the Jim Pepino H-1 the 25' WS version or the 31'9" WS version?
In either case I would suspect that the cowl diameter is 10.31" which should be just enough for the 250mm (9.84") Saito 450R3, of perhaps the ASP400R5 if the added weight, slightly lower power output & sketchy quality reputation aren't a factor.
The ASP400R5 can be bought for $777. Just a bit more than 1/2 the price of the Saito.