hi when i first got my 68 455 mtr it was in a delta custom that i wrecked anyhow its type c .now on the orig air cleaner it did say ultra high comp are these the large valve heads????

 

I'm not an expert with the Delta Custom, the only way I know of checking is to pull a head and measure the intake valve. There was no external marking on the heads to indicate small or large valve. I believe it was the application that made the determination. 442's and Toronado's got big valves, I'm not sure what else did. John

 

Between the 2.00" or the 2.07" valves is not a big difference for a street car. You would not be able to tell the difference. The machine shop can install the big valves if you want, a very easy installation. The biggest improvement with either valve, would be the 3 angle valve job.

Gene