I am looking for a Exhaust manifold for my 330cui 1966 F85. My stock one does have a crack. I did not find anything here overseas. Is that part interchangeable with 350, 400cui or maybe with Buick, Pontiac or even Chevy? Ordering from the US is difficult right now, so I try to find a part that fits from some other model

Thanks for your support!

 

You have to get Olds manifolds. None of the other cars are even close.

 

does a 350 or 455 work?

 

A 350 or 403 Olds manifold will bolt up. The outlet may or may not be in the correct place, depending on year and model.

 

It would be good to know if it is the right side or left side.

 

thanks a lot! Try to get one

 

will of course change both sides

 

As Joe said, the 350 manifolds will work and are very common here in the states. If you need something to search over there you might try 1968-72 Olds 350 manifolds. In the 1970's, not sure which year, the outlet on the passengerside changed angles. But I believe if you stay pre-1972 that your exhaust will line up OK.
John

 

shipping to Europe is difficult right now! Shipping and taxes will do the rest.

but thanks

 

Sorry, I edited my post to try and help your search in Europe.

 

Found one Pontiac Firebird/Trans Am 77-78 350/403
Oldsmobile Cutlass/442 1968-1977

https://www.raabspeed-imports.com/pr...-403-olds.html

 

that’s okay! Thanks a lot

 

These may not work, acutally I don't think they will. reason is headers are designed to fit the engine and engine compartment. The engine compartment of your 1966 F85 is different than the Firebird. The 403 exhaust manifolds will bolt up, but need the exhaust pipe angle on the passengerside modified. But we're talking factory cast iron manifolds.

 

was thinking about that too! Time to re-learn my welding skills :-)

will look more, but the parts situation here is difficult! Only Chevy, Chevy and more Chevy

 

Doesn’t matter to me, cast or anything else! Both is okay for me

 

Hooker shows their model 3901 headers as fitting 1968-77 Cutlass and 1977-79 Firebird with Olds motors. These headers will likely not fit the narrower 64-67 chassis without a lot of interference.