MACH I Member
Joined: Nov 2006
I don't know how anyone can install an intake manifold on the factory 200 I6 cyl head. The intake manifold is cast as one piece, it is part of the cyl head.
I've seen where adaptors have been installed from the one barrel port on the intake/head to a two barrel carb, but this is really a waste of time and money. You can only pass so much air/fuel into the bottle neck one barrel port. I've also seen the deal where two additional one barrel ports were machined into the intake/head. Expensive operation with so so results if you ask me. The small exhaust porting and the two center exhaust ports with the siamesed arrangement are restrictive and will do a good job of negating any intake mods.
Classic Inlines has just introduced a really nice cylinder head with a separate intake manifold. There are several intakes available all the way up to fuel injection. This stuff was designed with performance in mind and in my opinion is the only way to go if you are serious about getting your six to really wake up. There is also an Australian Ford cyl head that has a separate intake manifold arrangement, but I'm not really sure it would be any cheaper than the Classic Inlines set up.
By the time you have gotten the machine work and porting, the valve job and necessary center exhaust port separation work along with throttle linkage set up on your intake/head, you've probably spent enough money to buy the good stuff also.