Did the 340 really make 275hp?

Just for giggles - I ran a 340 68 manual cam thru DD2003.

.444" / .453"
276/284

I used the following X head flow figures off the Al West site.

.............................................................................. .600th

Int 32 58 125 172 208 221 210
Exh 22 45 95 122 135 140 142

Pretty darn close!!