Saying the collector is the restriction MIGHT be valid if all four cylinders feeding into the collector fired AT THE SAME TIME. But they only fire one at a time, so the cross section of the collector does not need to be larger than the sum of the tubes.Only 1 5/8? What size is your collector? 3" ? 4x1 5/8" =? Much more than say 3" Where is the restriction, could be in the collector not the primaries.
They call them the 6208's swap headers because they will also work on a 65-66 with a 351W. I have the 6208's on my 69. The thing that makes them worth the money, besides the larger tubes is that they fit and are great quaility. It's not so much the distance between the shock towers, it's the location of everything down low. Steering box, frame rails, steering linkages, trans, etc. I had a set of regular Hookers for the 69-70 w 351W. Had to jack the motor up, remove the starter, remove the idler arm. They also interfered with the shifter cable bracket. bought a set of the Hedman long tube 351W headers. The quality was so bad on the welds that I refused to install them. Sold them at a loss.On 2002-02-28 12:25, qtrhors wrote:
I dont see were swap headers are needed as headers for the 69/70 stang with 351W should work as the engine compartments from 67-70 are basicly the same.