Need a Mopar guru: 273 part-throttle ping driving me crazy!

66fs said
When you refreshed it did you notice the pistons? Dome or flat top, 4 valve notches or two?

I didn't refresh it, previous owner (actually owner before previous owner) did, so uncertain what kind of piston tops. What came stock on a '68 Belvedere with a 273? Were there various pistons the factory used?

66fs said
Since it has a Prestolite distributor, did someone put a 2 barrel carb and intake on a Commando motor?

Possibly. But was the Commando 273 motor an option on a '68 Belvedere? Also, did Prestolites came only on Commandos? I did not know that.

66fs said
You cannot hear the solid lifters in a Commando motor, pull the oil filler and look for adjustable rocker arms.

I will do that! Thanks!

66fs said
Way out on a limb here, nothing else makes sense.

That's why I am going bonkers! =(