Yep - if it is a 370, its a 76 or 77. I restored a 76 a year or two ago, so my guess is you are shooting for it to look like the attached pic!
I have a 77 370 right now that I hope to restore this winter as well. Feel free to shoot me an email or PM as I have spent a fair bit of time wrenchin on the old Suzukis.
go to
http://www.vintage-suzuki.com for repro plastic - Tony Boswell is the guys name - nice guy to deal with. He also can get a variety of other goodies. Also, go to
http://www.calvmx.com/guestbook/ to find parts you may need.
I didnt ride my 76 much before I sold it, but man did that thing HIT! I also discovered that I have become spoiled with disk brakes! I was blasting towards this fence near the north end of my property, clamped on the binders like I might on my KTM...it just doesnt stop the same!
Best of luck to you on your restoration! It an addiction you know! :p