[Brent67CAT]

I have a 67' 4 DR HT Catalina with a 400 2bbl with 143 heads and single exh. I would like to put on some headers and dual exh, but there doesn't look like there is much room in the bay. Any suggestions? Thanks Brent

[Brent67CAT]

I have a 67' 4 DR HT Catalina with a 400 2bbl with 143 heads and single exh. I would like to put on some headers and dual exh, but there doesn't look like there is much room in the bay. Any suggestions? Thanks Brent

[Ccass]

If it is column shift, I believe you have a problem. If not, Doug's headers makes an excellent set for big Pontiacs. They are quite expensive(over $400) With your combination, you may want to take that money and first put it into other power adders. For starters, I'd get a 4bbl intake/carb and convert to dual exhaust.

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Fool around, Get hurt, don't come crying to me.

[Brent67CAT]

Unfortunately I do have a column shift ( th400 )
Are there any performance manifolds out there

[Ccass]

yes, The long branch manifolds. I'm not 100% sure they will clear your column shift linkage though. I would post an additional topic in the Fullsize tech forums.



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Fool around, Get hurt, don't come crying to me.

[can_am4me]

I had a '67 Bonneville in high school. and we put a set of GTO headers on, with a few modifications.

We shimmed the motor up with a 3/8 in steel plate under the motor mount( just drill a large hole in the plate, slide it in, and bolt up the engine)

We had to ding a couple of tubes in a few spots (can't rememeber where, long time ago!)

These 2 mods gave enough clearence. I would suggest finding a junk set of GTO headers first, and giving it a try.