I know on my d16z6, a 10lb flywheel made an amazing difference. On a bigger engine however, it may not be as dramatic.

All you really have to know going into it is how to disconnect the shift linkage, ball joints, and have a mechanical sense to you.... It's not hard, that's why I'm dumbfounded that someone with a b16 in their car has never done it. If you have the money to throw at parts, and pay for installation, more power to ya. I don't trust anyone to do work on my car, cause every time I have in the past, it got ****ed up. Do it right, do it yourself. I've done probably 15 swaps by myself, and have two to do this weekend. If I can't get a honda motor out of a car in under 2 hours now, there were major problems with things stripping or breaking.