Possible 4-Port N/A Start?

[infernosg]

^^^ Figured as much. I know I could easily just swap the front and rear covers from the current engine in and call it a day. Only reason for considering the S4 front was because of the mechanical OMP, which I'm on the fence about keeping and I don't really want to have to pull the current engine and have the car down for the entire duration of the build.

The RX-8 rotating assembly is tempting - I just thought I read somewhere (probably RX7C) that the RX-8 rotors weren't necessary a good change, despite the increased compression, which is something I'd like to have.

Hopefully will be checking out engine today. May also be picking up the transmission as well (don't know if I'm going to use it or not though).

EDIT: Still debating between a small bridgeport (not cutting into water jacket) or large streetport for the motor. I've read a lot on both and am still not decided. Can anyone make a case for either?