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What's most important here is track record. What engine is notoriously the most reliable. Which engine has put more cars at the top of the 1/4 list? Which engine physically fits the best and/or is the easiest to install. I think you all get it.... (If you don't, it's the 3800). We can go back to paper and say "X isn't ideal because its heavier than Y", "wouldn't it be nice if X were made from the materials Y is", but then again the Fiero is pretty far from ideal to begin with. Like I said, too many people try to make the car into something it isn't, and they never even finish swapping the engine. The people who settle for engine's like the 3800 get their car put together and get to enjoy the car for what it is, pretty far from ideal, but still fun for a thirty year old platform. I think both forums undercut reliability far too much. Sure we all have expectations, but what's the point of having the car at all if we can't get in it whenever we want and drive it across the country if need be. Swaps like the LNF, 3.6 DOHC, Ecotech, etc have either little or absolutely no track record. What's the guys name on piffle who's been trying to get his Ecotech going for years? Its been so long that there's a celebration when a video of the engine idling is posted... I mean come on, we have to have higher expectation than to simply hear the motor start in two years. That's a lot of wasted life.
If we are going split hairs, the first thing that needs to get crushed is the Fiero.
Note: I'm not taking anything personal here, or directing anything at anyone. I've just spent way more time in my life than I'd like to thinking about this concept. I might as well put those thoughts out there.