Quote Originally Posted by Henry Rifle
Dave,

Did you use Earl's collector seals also?

http://store.summitracing.com/partde...0&autoview=sku

I have my exhaust off the car while installing the seats and seat belt mounting, so I'm going to re-do the gaskets. I used Sanderson's recommendation, but after thinking about it - and reading your earlier post - I'm going to use some decent gaskets. I like the look of Earl's header gaskets. I just have to make sure that they have a version for the Vortec heads.

By the way, the ports on my Sanderson headers (made specifically for Vortec heads) measure 1.5W x 1.875H. The ports measure 1.5W x 1.5H. The ports on the headers are a full 3/8" taller than the ports in the head.
Jack,
My header ports are a bit tall as well - probably in the 3/8" range too big which is the reason I am using the Earl's header seals. They actually have replaceable gaskets mounted inside the metal holders (I guess that's a proper term for them)

I couldn't use standard flange gaskets - for whatever reason I couldn't get them to close enough for gaskets so reverted to the tried and true donut type which fit fine .