Just bought a 383 from a guy who's not the original owner.. It has LT4 heads that appear to be lightly ported with the matching intake manifold.. Trying to figure out what company might have ported the heads..

 

https://m.facebook.com/TPS-Motorsports-TPS-Race-Engines-123040427827435/

Given your screen name indicates you may be from Louisiana, a quick search for "TPS machine shop louisiana" turned this up. Seems like a good starting point.

 

^^Thanks, I'm going to check them out..