1965 Barracuda with a 360...intake suggestions?

The intake runners on the 273 are mmaller than the 360. This will add to turbulance and lack of power. As a bracket and stock eliminator racer you'd be surprised what is done with stock/factory parts. The Edelbrock LA340 is a great manifold with lots of them for sale at a resonable price. Make sure that they have not shaved the maniflod to match the heads.