When I got my '51 in 1987, the first thing I did was buy a set of Fenton headers and install duals. I remember the drivers side headpipe to be a challenge, but I got them installed and loved the sound. About 20 years later, I remember reading on one of the forums (I believe it was the H.A.M.B.) that Fenton's don't fit "shoebox" Fords.