oh actually I have
and 302, 305, 350, 383 etc etc.
Datsun inline 6 (2.8 out of the 280)
old chevy inline 6 (256 ci if I recall).
again, a piece of metal with more metal in a reciprocating configuration (regardless if it is 4, 6, 8, 12 cylinders). Not to hard to screw up unless measurements...