Originally Posted by Dechstang
i'm looking into purchasing a '93 Lincoln Mark VIII with a 4.6L DOHC i know the SVT Cobra's have the same engine with a better intake setup what i was wondering was is there somewhere that sell's these parts or better upgrades for these engines?
These are not identical engines to the Cobras. The heads are different, and the shape of the ports are different. These heads (pre-99 split port heads) will not hit the horsepower that the later tumble port heads can make.
Here is a site with some information: Ford modular SOHC & DOHC tech & specifications
Note the schematic for determining the shape ports present.
Note also the importance of retaining the crossover hose on aluminum blocks.
Thre are some differences with the engine dress and accessories and their attachment also.