[Scott Stoneburg]

Guys, Im helping a friend. ( me doing all the work for him..lol .) Swapping the old #15 D-ports for a set of E-heads. I just removed the old heads and can not believe how rediculous it was to get to the header bolts on the back side of the 3rd tube on both sides. The drivers side was way worse. With round ports what are you guys using on the '67 GTO? I have heard that Dougs fit well but are the back tubes accessible?
Also thinking about using the RARE HO manifolds. But they are listed for the '68-'69 GTOs. Will they fit a 67? Also this is a stick shift car.

[Old Goat Racer]

I have Doug round ports on my 65 GTO. Fairly easy to install. I think I Had to reroute the brake line on the pass side.

[Barrier Blue]

https://www.ramairrestoration.com/po...oversized.html

[Scott Stoneburg]

Originally Posted by Old Goat Racer

I have Doug round ports on my 65 GTO. Fairly easy to install. I think I Had to reroute the brake line on the pass side.

Any chance you could post a pic of the headers from standing at the fenders looking down at the header flanges? Sorry to be a pain. But Im sure i can get the headers on, but I dont want the owner to have a hard time with gaskets if they ever blow out.

[Scott Stoneburg]

Originally Posted by Barrier Blue

https://www.ramairrestoration.com/po...oversized.html

Nice, definetly an option i will look at. I'll call them to make sure they clear the Z bar for the 4 speed

[LStathas]

I cut the flanges between the end and center ports and start the bolt in the flange hole as I lower the headers into place then start that one by hand first.

[Old Goat Racer]

driver side the best I got. sorry. car is against a wall. These are round port Doug headers.

[Old Goat Racer]

https://www.summitracing.com/parts/d...7/make/pontiac

[Old Goat Racer]

IF I ever have to do it again (not likely) I would do what "Barrier Blue " suggests .

[Scott Stoneburg]

Thanks guys. I appreciate the pics. I will have to make a decision. Gonna be tough. This isnt a race build so I may lean toward the ram air manifolds if they will clear the Z-Bar.

[Jerry H.]

Ram Air manifolds, hands down!

[Skip Fix]

I have a set of the IA multi piece headers new but I've never installed them in a car.

[Scott Stoneburg]

I saw a 65 with Doug's today. They are what i will most likely end up with for this car. Thanks for all the input. 👍

[younggto]

Headers on a 67 (or any 64-7) with a 4-speed doesn’t leave much room for anything on the DS; plan on moving brake lines and insulating the tube near the speedo cable, at least I had to with my IA 1 7/8 headers. If it isn’t a race car I’d go with the Ram Air manifolds; even then those cars had different brake lines from the factory (D-ports obviously).

[Old Man Taylor]

I have Doug's on my '64 Tempest. Once you get them in you can get at every bolt with a box wrench.

[Old Man Taylor]

Why go with high flowing heads and then strangle them with the exhaust manifolds?

[Old Man Taylor]

" - - - Also thinking about using the RARE HO manifolds. But they are listed for the '68-'69 GTOs. Will they fit a 67? Also this is a stick shift car."

Only one side will fit.

" - - - I have heard that Dougs fit well but are the back tubes accessible?"

I don't have a picture of them in the car, but this picture will give you an idea of bolt accessibility. Once they're on, they have the best bolt accessibility of any headers I've ever run.

[Old Goat Racer]

Originally Posted by Old Man Taylor

" - - - Also thinking about using the RARE HO manifolds. But they are listed for the '68-'69 GTOs. Will they fit a 67? Also this is a stick shift car."

Only one side will fit.

" - - - I have heard that Dougs fit well but are the back tubes accessible?"

I don't have a picture of them in the car, but this picture will give you an idea of bolt accessibility. Once they're on, they have the best bolt accessibility of any headers I've ever run.

OMT. Which side doesn't fit ?

[Old Man Taylor]

I don't remember for sure.

[Scott Stoneburg]

Originally Posted by Old Man Taylor

" - - - Also thinking about using the RARE HO manifolds. But they are listed for the '68-'69 GTOs. Will they fit a 67? Also this is a stick shift car."

Only one side will fit.

" - - - I have heard that Dougs fit well but are the back tubes accessible?"

I don't have a picture of them in the car, but this picture will give you an idea of bolt accessibility. Once they're on, they have the best bolt accessibility of any headers I've ever run.

Thank you sir.