Any 351-C experts able to help with identifying 4-V quench heads? The car I'm looking at has a 4 cast into the head next to the valve cover flange. I remember that there are two markings. One with just the 4 and another with a 4 and a dot casting. I thought the 4 with a dot are the quench heads for higher compression.
Can anyone confirm?
Thank you.
Don
gt350bp