On the Jimmy I'm either going to use the Howard Log manifold or an Offenhauser 4bbl manifold. The 302 doesn't have many options.
I may try it first with the stock 2bbl manifold just to see what the differance is. The engine has a Holley AA-1 (2 bbl 3-bolt flange) carb on it now with a 3" center dump exhaust manifold.