Jean-Paul, I have workled on type 4 engines and rebuilt one that was in a girlfriend's 412, and I just don't care much for them. Add that they look funky (to me, anyway) and I would rather have the classic cooling shroud look in the engine compartment.
A 2.7 liter versus a 2.4 liter isn't that big a deal, especially since the type 4 heads are a limiting factor. If the 2.4 isn't quite nasty enough I can always drop the compression and add a turbo.
If you would like to see some BHP improvement from your engine you could try 48 IDF's and a 1 5/8" exhaust. Failing that, 38mm venturis for your 44 IDF's and rejetting would help (venturi would be 4mm less than your intake valve size). Also, I had a noticable performance improvement when I went from 30 to 32 degrees total advance on my 2,110.
(Message Edited 2/14/2003 3:25:29 PM)