Seeing as its pretty hard to get a S5 TII keg around here thats within my price range, I am seeing lots of S4 TII engines that are.
I was wondering can I just use just the keg and and just swap all my S5 TII parts over (manifolds, electrical, ect.)

 

pretty much.

 

You will have to swap the front cover for the OMP to work. The sender for the factory water temperature gauge is slightly different between series although they both work fine. The s5 LIM is larger at the intake port runners compared to the s4. Compare the LIM gaskets and you'll see what I mean.

The knock sensor is in a different location on the s4. It's in a more noise-prone location on the middle iron. I'm not sure how the s5 computer would react to that. It may retard timing some due to possible false knock readings. Or it may not have any real world effect.

 

Since Im going to be premixing I can just block the omp and use the S4 front cover right?
So its going to be pretty much just a transfer of parts, and no huge hassle.

Thanks for the help