Building out a 273 recommendations

If it's not a Commando, it's a low compression motor. You may be wasting your time with big cams if you don't have any compression to start with. Think about it -- more duration means overlap means more bleed off.

I don't know if I'd waste my time building an 8.8:1 (nominally, probably less than 8.5:1), small inch motor. Just not much potential there. Unless you turbocharge it...