Regarding the double line clip sold by Inline Tube:
It is an EXACT replica of the double line clip found along the rocker panels and on the rear side of the subframe where it is used to attach the fuel line and the brake crossover line. I pulled factory installed clips from two 1968 Firebirds for comparison. Installation is simple, just push the clip firmly into the hole then drive a #2 Phillips screwdriver into the hole. Then angle the screwdriver while halfway into the subframe and run it around once. The barbs will expand like a rivet and hold the clip very firmly in place.
The clips on the front side of the subframe which hold the fuel vapor return line are the other style, shown with the broken barb.
The screws and brake line clips are not up to spec.
The first time I ordered a set of Firebird brake lines they did pull a Camaro rubber line by accident. It was marked Camaro, not Firebird. They immediately replaced it, with an apology. 2 sets ordered since then were correct.
The '68 clips you removed at the rocker attachments must differ from mine if you say these red ones are exactly the same. These red reproduction clips are not an exact copy of any clip found anywhere on my 1968 Firebird. My car is down to labeled bags of hardware. There aren't any holes along the tube routing along the rockers large enough to accept that red double clip.
On mine there are two double clips that mounted with hex head screws. One is on the rocker and the other is next to the rear hose. Where the lines cross the frame rail, one metal double saddle clamp held lines securely with a fastener through the center. On the subframe, the barbed clips were used for double lines. There was also a double clip holding the speedo cable. For single lines, there were several styles of strap fasteners with machine thead hardware. There wasn't anything identical in the replacement kit. Here are photos of the double clip that uses the hex head screw.
Here are two examples of brake line clips which I believe are orginal to the car.
Here is a collection of some original clips and hardware from my '68 to the left of the black line and the Inline tube replacement parts to the right.
The stub sticking out from the red clips was larger than the mounting holes in the subframe. I had just painted the subframe, so forcing these to work where barbed clips belonged was out of the question. Threading wrong thead pitch into the subframe wouldn't be quality work either. (Comparison photo)
If you go to their online catalog and look up the replacement rear brake hose, they list PH-586 as their part number. Here is the part I received.
If you look up the rear brake hose for a '69 Camaro with a different vendor, you'll find a Raybestos replacement part BH36586 with an overall lenth listed of 14-1/4". If you look up the rear brake hose for a 1968 Firebird, the listing is Raybestos BH36527 with an overall length of 13-5/16". The similarity in part numbering methods might be coincidental, but the PH-586 I received is an inch longer than the original hose from my car.
