early 273 intake manifold

[LonelyDuster]

Good day to everyone, I found some 1965 273 closed chamber heads that I want to buy for my 1974 318. I think I need the intake to match them, as the bolt pattern is different? My questions are : are these a good upgrade for my 318 and are there any aftermarket 4bbl manifolds available for them?

Thanks in advance,

Rob

 

[64physhy]

Offenhauser does a limited run on them every now and then. Other than that, you'll have to find an old one on ebay or something. I think Edelbrock used to make one for it years ago, but not sure. Other options, if you're set on 273 heads, is to find some from a '66. They have the later bolt pattern so you'll have a lot more choices on intakes. Or you could take the '65 heads to a shop and have them re-drilled for the early pattern.