L88 or not?
 

Hey guys, I figured somebody could help me out with this. I am looking at buying a complete 69 L88. 427, floating wristpins, mechanical tach, etc. But the code stamped on the front is BL. I can't find a refence in my stuff to the BL code. The guy that is selling it said he was told by another potential buyer that it was a service replacement code. Can anybody shed some light on this? Thanks