I always thought the MP stood for Maximum Performance, as that was the name of the engine. The Maximum performance wedge head engine - or Max Wedge.
Your engine is coming along nice 62 Dart!
When I first click on the link I'll see the home page but then it blinks and all u see is a graphic of a '64 dodge. I even tried it through Google. It might be my device. Don't know...
I have exhaust manifold envy Bill - I would dearly love a set of those babies!!
Mancini Racing MRE426mw for $1025.oo, but then the max-wedge TTI exhaust isn't cheap either $1222.oo