i'm not sure where i posted it on this forum, but i gave the wrong advise about clearance between the air cleaner and hood, i said i had 1 1/8" clnc, WRONG, i forgot about the inside hood supports, and i had put the clay in the wrong places. i found my mistake because i just put a `1" rizer in, and it hit one of the hood supports, so don't go by what i said, no more advise from me, i don't know what i'm talking about, jerry
Don't let it bother you I have made lots of mistakes.
I'm happy to see that you had the presence of mind to put some clay on it to get a reading.
No problem. I ordered a 1 inch spacer and plan to buy an Edelbrock low profile air cleaner to provide enough clearance. About $28.00 with shipping on Ebay for the air cleaner.
Here is a picture of the 1 inch aluminum spacer and low profile air cleaner that I installed on my Y block. Time will tell if it resolves the occasional starting issue.