273 to 360 exhaust

fstfish66, I'm not saying that you wouldn't be able to get them to seal like "Sreyno" says but you can see the gaskets for your self. I had read many stories about the 360 manifolds leaking so I didn't take any chances, I drive this car around town a lot and hate the smell of exhaust!! The bolt holes are also bigger so the manifold won't center-up on the ports very well. So I got some thin wall pipe/tubing 5/16" ID and cut pieces to put into the bolt holes to help center-up the manifolds. You'll also need to rotate your 90 degree filter. Otherwise it fit perfect. The best thing about it is that now that I'm going to build a 318 stroker with 360 heads the manifolds will be perfect because they are 360 manifolds.

When you have 2 1/2" exhaust pipes it doesn't help at all if the exhaust has to pass through a 1 7/8 restriction on the way to the 2 1/2" pipes. Gas flow is determined by the smallest diameter in your exhaust system.


Treblig