If it's Engine Masters: season 2016 only had 16 episodes https://www.imdb.com/title/tt8205168/episodes?year=2016&ref_=ttep_ep_yr_pv
I believe that I watched that show on tv. It was the 455 build. they also rebuilt a 350 by the same builder. However, they used the footage from the 455 build for the actual350 build.