273 exhaust manifold ?

[mischiefdart]

A friend of mine just picked up a '66 barracuda 273 2bbl. automatic. He does not want headers and was curious about the exhaust manifolds . Are the 273 commando exhaust manifolds different than the standard 2 barrel manifolds? He wants to put an aluminum 318 4bbl intake and a mild cam in to get a little more power. 

[Jim_Lusk]

No, all 273s for any given year had the same exhaust manifolds.

[mischiefdart]

Thanks Jim. I thought they were all the same but was not sure.

[BIGFISH]

I used later A body manifolds ('73 Duster to be exact) and they dont have the huge elbow in them. Gotta change the headpipe, but you'll want a bigger set of pipes anyways.

Brian

[acpat]

you better watch the intake some 273's used angled bolts so a regular intake wont bolt up. just FYI

[Jim_Lusk]

66 heads had the same bolt holes as later LA engines. It's the 64 and 65 you have to watch out for.

[fasttcars]

if he can find a set of 340 manifolds  they look a lot alike  just bigger...or a set of  newer magnum manifolds...they both flow   alot better

[levonsa]

I have not seen any of these, but here is a link to reproduction 340 manifolds.

http://www.accurateltd.com/340-Exhaust-Manifolds-Pair_p_9-162.html