Manifolds need decoded, Help!

[Alaskan_Dart]

I have a pair of exhaust manifolds that I need to find out what they fit, any help?
Here are the numbers.
Left # 2843992-2
Right # 2806900
Build date 1-31-68


Thanks.........Mark

 

[Mrmopartech]

The manifolds decode as this:
2843992 LH 68-69 B body 383/440-4bbl HP
2806900 RH 67-8-9 B&C body 383/440-4bbl HP
mrmopartech