Blew the Manifold... Need Advice on new one

[SLOW 97]

The SVO intake does exist and it can be found at http://www.fordracing.com/performanceparts/ in the parts search for intakes. I would get PI heads though and use the Bullitt intake. The SVO intake is quite expensive and still shares the same oval ports that the non-PI heads have. I really think I blew my manifold too. It makes a whistling sound sometimes and sounds like there is a vacuum leak somewhere in the manifold. I have looked for cracks but couldn't find any. A dealership said it was fine though but I think that's just because they don't want to fix it for free since it's under warranty.