Hello, I figure I might as well jump in on this conversation since I do have a 1UZ swapped into my s14. First of all, you will have to do something about the oil pan. The SC400 oil pan is a mid sump design which I believe will hit the cross member. You can either cut the cross member or pick up an oil pan and sump setup from a LS400. I love the engine in the s-chassis. With deleting a/c, it weighs almost exactly the same as the KA. This keeps your weight balance the same as the stock car. The LS1 is roughly the same weight also. I would recommend this swap to anyone. I have a grand total of $2000 in my entire swap. Yes, the LS1 will make more power. Why wouldn't it? It is almost 50% larger displacement, and N/A upgrades are definitely cheaper for the LS1. When you go turbo, it all starts to wash out. The turbo kit is going to cost the same on either setup because it will have to be built from scratch. The main thing you have to look at is what kind of drivability do you want? Unlike several people I know who have LS1's in 240's and RX-7's, I don't fear for my life when it rains. The powerband of the 1UZ is silky smooth with enough low end torque to turn the tires over if you want to, but it shifts the power up in the rpm range to pull consistently across the entire spectrum.

Final conclusion, if you are building a drag car or some other high torque application, buy the ls1. If you want a nice handling smooth street car, go with the 1UZ. If you have either one laying around for free, put it in no matter what! People can tell you to put an ls1 in your car, but last I checked, no one steps up to help you pay for the project. Your call.

Here are some pics of my project:
wattydchi/1UZFE Engine Bay - Photobucket - Video and Image Hosting
wattydchi/1UZFE Transmission Mating - Photobucket - Video and Image Hosting


Watty