no offense JDMsweetz but a newbie to the site claiming that they sell motors, is prrolly the last guy i would buy from, if you can point us to some of your sales maybe to prove you are reliable then maybe we will consider it.
As for the questions
1. Its only illegal if the motor your swapping is older than your car, or you dont hook up all the nescarry emissions control devices.
2. the 94-97 Del Sols, came with the b16A2, produced about 160hp, you might not even need mounts to put it in your sol.
3.
www.hmotorsonline.com is the most reliable place on the net i have come across, myself and many others on here have ordered from steve with no hassles at all.
4. The motor will be reliable as long as you keep it in good running order.
I hope this info helps you man. Good luck.