since your engine has been upgraded, upgrade your hood. There's mixed opinions about the repo 400 hood. Now and then, a worth while original will pop up on eBay.
The 4.1 Liter OHC-6 hood badge can be purchased through Ames. http://www.amesperf.com/ Part # FD104K, $79.00/pr. The only thing about this reproduction is it comes in two pieces. the original was one piece. I can attest the quality is spot on, and once put on the hood you can't tell it's two pieces.