Do I go with the 318 or the 360?

$1500.00 to notch the bores is a giant screw job. It doesn't take 15 hours to notch bores, and that's at $100.00/hour.

Plus, as RF said, no need to do it. The valves open on the centerline of the bore. It's not a 273.

It sure is, especially when 2.02 valves fit without notches. Been there, done that.