Questions Mark 8 swapp

[RuffGT99]

Hey guys, I have a few stangs. I have a 96 mark 8 i was considering swapping the engine to my 99. Should I swap the intake and heads? or Just rebuild it and the whole dang thing?

 

[General karthief]

I think the mark vlll was an aluminum block/heads like the cobra engine, sounds like a good swap to me. I think there was some swap issues with some cranks not drilled for a pilot bearing but I'm no modular melvin so I'll move this to a forum with some more experienced members.

 

[tsemmett]

Some things to consider:

• The 4V heads have a larger combustion chamber (51cc vs 42cc), enough to drop your compression ratio by about a point (roughly 8.2:1 on your 2V shortblock).
• These are 4V B heads, which the general consensus is that they require boost to be worth much.
• The Mark VIII engine has runner controls that the Mustang doesn't (have to be deleted).
• Stock for stock, there's about a 20hp difference between the two engines.

The good news is that this would be an all aluminum engine, with a Teksid block. If you have the desire to build something a bit meaner, it's a good starting point (though I find a set of C heads and an intake to match personally).