Hey guys,

I have a 67 Ranchero with a 390 'Z' code engine. It came originally with a 2 barrel, but I have been wanting to upgrade to a 4. Because the absolute lack of options out there, I decided on the Edelbrock Performer intake. However, when I tried to install it - the intake did not sit flush with the heads, and I was unable to bolt it in. Is this because of a manufacturing flaw - or do 'z' code 390's have different kind of heads that do not work with this intake (basically the only one available at a decent price for this damn engine). Thanks for all your help guys.