Any help appreciated here.
My old 1967 427/390 car is being painted by its current owner (he hit a deer

). It is a factory sidepipe car but has headers on it now with exhaust out the back.
I can verify I have the correct right hand exhaust manifold 3880828 to put the car back right.
The correct LH is 3880827 - I believe.
I have two LH BB manifolds with these numbers:
- 3883898
- and 3989889
Any idea what these are off of and will either work for a 1967 Vette?
Does anyone have a 3880827 and how much will one cost?
thanks