I must say: 4cyl engines = bla bla yuck yuck whether it is a build 2.0 or a big 4 (even those rabbi engines bla bla, I'm better than all of you with my perfect big 4s that cost more than 911 engines), V8s ehhh they are ok but never have the resale and they don't sound German (ya big deal but it means something to many of us) you also loose the trunk,
Ahh the Porsche 6 cyl... YES! costs money to do but it is well worth the trouble. I go to Porsche shows and hang out with the other 914-6 guys, its like being part of a special group. I can relate to 914 guys with 4cyl engines very well. A 914 with 200hp is a completly different car. So much fun and so worth it.
For a street car I like 3.0 and larger engines, less revs but much more torque, I can use 3rd gear for everything if I wanted. I was so pleased with my 3.0 Weber engine that I pulled it and bought a Euro 3.2 and I'm going to use the Motronic. So its FI time for me. More work but 250hp sounds very nice. Now that I have so much power I am fixing all the other stuff on the car to effectivley drive this car. I am tweaking the suspension heavily, doing Boxster brakes all the way around, seats with bolsters to hold me in one place, regeared transmission, and I am going to build a huge ralley bar for spotlights and such for fast night driving.
Its worth the trouble, hands down. Of course I built my whole car for very little, but then I am a Porsche mechanic and a parts vendor so I come across deals here and there.