John Starr

What is the right number power valve for my 1972 LT1 Holley carb?

L Holmes

John: Check your carb to be sure but I think the 72 cars used a Holley list #6238-1. If that is the case you can reference this chart and you will see they used either a 6.5 or 8.5. http://www.hotrodreference.com/951/h...valve-ratings/

My 70 LT-1 has a 8.5 in it if that helps.

John Starr

Thanks for the great link to the chart and your comments.

L Holmes