I believe the LS is somewhere in the range of 50 lbs heavier than the 4 cylinder. Whether that's a 1.6 or 1.8 I don't know. Also unsure if that takes into account accessories on the block... But 50 lbs is the # I hear thrown around. I also hear 200lbs total added with the V8R kit, and 1/3 being over the rear wheels (with the 2" setback kit like I have). But even then, is that with a heavy ford 8.8 or lighter cadillac diff?? Lol.
My car weighed just about 2,100 with half a tank. I'm shooting for 2,200-2,300 when all is said and done.