Originally Posted by jolaroaa
I am hoping someone can help me on this... I installed a '76 Camaro front clip on my '59 Apache and need to know the height of the front brackets that the front clip bolts to in relation to the main frame. I need to remove and reweld the front bumper supports because it was installed at the wrong height the first time. I have the cab and front end removed and didn't want to reinstall to take measurements if possible. I have attached a picture with arrows pointing t the brackets. I hope propaneburner did mind me using part of his picture, thank you and thanks for any help...
The original frame is flat on top from the rear kickup to the front of the frame. The core support brackets are about 1 1/4" high. I would set a straight edge in the top of the frame behind where you modified it, and shoot the front of the frame off that. Then measure up 1 1/4" for the core support mount. I actually shoot my frames with a Laser level to do this.
As to what subfame to use on an 47 to 54 AD truck, The factory tread width is right on 57". A 67 to 69 Camaro/Firebird, 68 to 74 Nova are both the same width, 56.5", and for this purpose are identical. They have the advantage of rear steering, and don't interfere with the core support. A 78 to 87 GM A and G body are about 56" wide, and are front steer. The core support has to be modified for room.
A 70 to 82 Camaro/Firebird, 75 to 79 Nova, is 60.5" to 61" wide, too wide for an AD truck, but just right for a 55 to 59 truck. They are also front steer, but installed correctly in a 55 to 59 truck clear the core support fine.
You can use the 70 to 82 Camaro spindles on a 78 to 87 A and G body front end, they have bigger brakes, and bolt in. It also gives you somewhat quicker steering.
79 to 84 RWD Cadillac spindles will also fit the A and G body subframe, as well as the 70 to 82 Camaro subframe and have 12" brakes. 94 Camaro rotors will fit the caddy spindles for a 4 3/4" bolt pattern.