[SCOTI]

I have 'used' Chevelle headers from an unknown manufacturer on my dually w/a bbc. Full length, 1.75" primary, & 3" collectors. They are about 1.5" above the bottom of the frame rail (which is slightly taller on a dually but they would still work just fine on a 1/2 ton). I had to clearance the motor mount shell to ensure .250" clearance from everything & trimmed the lip of the frame rail where it drops under the cab (again, just to ensure a full .250" clearance everywhere). I tried them because I used Chevelle headers on my 67 & they cleared well. Much cheaper vs 'custom' headers....