GB-- Back when we did the D ports, there was very little interest in GTO headers since you could by them anywhere for $79.00 and GTOs could be had for $500.00!! So we shortsightedly made them for F bodies. The fit problem for that header on the GTO is that the GTO crossmember is about 1" further rearward in relation to the engine than the F bodie. If I had to do it again, --No --goback in time--I would make it fit both cars. Today, I wouldn't bother , since like the 70s there are many brands of D-port headers to chose from for both cars--starting @ $100 or so. It is difficult to justify new prototypes and tooling and fixtures and minimum order quantities for a header that has to sell for maybe $400-$500 against a percieved value of $100.
|