3 point seat belt help.

[72 shorty]

I'm new to this site and hope I am putting this in the correct area. I need a little advise on 3 point seat belts. My 16 yr old son and I have just started a 72 SWB fleet side project. With the idea of keeping him a little more safe in case of an accident while he's cruising around we have decided we should install 3 point seat belts. I have seen different suppliers of seat belts but we were wondering which brands/suppliers you have used and your opinions. I don't care the cost just want a good quality product. Thanks for your help!