Your thoughts on intake/exhaust choices ??

The more I learn about these engines, the more I see that they were terribly restricted on the exhaust. I think the number one biggest thing you can do is open up the stock manifold outlet to 2.5", port it OR put headers on it. Even the Super Six option didn't do that. While they did use a bigger head pipe, it still had to go through the puny *** 1 7/8 outlet on the manifold, so the bigger pipe was useless as tits on a boarhog. Couple the exhaust mods with the Super Six intake and a 318 Carter BBD and you'll have something. Add a hotter cam and you're even more on the way. Slant sixes respond well to mods, just like any other engine. You just need to remember, they aren't a V8.