I have an 86 firebird, it used to be a canadian V6 car but now its a 350

I had some strange overheating problems when driving around, i got it on a lift at work, and theres no airdam.

I see a bunch of NOS ones on ebay, 1 piece and 3 piece.

which one do I get?

 

I think the 3 piece is the newer version and replaces the 1 piece but I could be wrong. Check the "search" function at the top of the page and type in your question. I have seen quite a few people with `birds` asking the same question so the answer is there somewhere. Good luck