I am in the process of putting a 440 in my 64 dodge 330 which had a slant 6. I been looking at headers so I know what will work with this combo but I also like having the cast HP manifolds as well. The max wedge manifolds are pricey. What would be the best cast HP exhaust manifold to use for my application? I have a 67 440 with 915 heads, calculated 10.35:1 compression, voodoo303 cam and 800 cfm carb.