I bought them at an auction in Atlantic city last year. Pretty sure they said custom fit sbc.
The rad support is working out pretty good. It is tacked together, I'll finish it next time I have the front end apart.

 

Could it be that they are designed to go under the headers and up to the plugs? Some aftermarkets are built to hide the wires behind the heads and under the manifolds. That's the way I ran them on my gasser 327, and it hides the wires. I like to buy them with only one end installed, then install the other as I fit them.

 

Just two are not the 90 deg, no good way to hide it. You can see them on no 5 and 7. If I took a pic of the wires I have wrapped around the dist. you would be amazed. I'll be getting new that I can terminate and all 90 deg.

 

Ok what I do. With the motor at TCD I set the dizzy in. Orient the rotor to point at about the #1 plug/ first intake bolt in that neighborhood. The distributor gear will catch in the cam gear even if the oil pump shaft isn't lined up. So by spinning the motor everything spins together except the oil pump until the the two line up. It should drop right down in less than one revolution. Its never failed me. Then bring it back to TDC and the rotor will be pointing at #1 on the dizzy.

 

Redid the rear shackles and bushings. That kicked my A$$! Too many times up and down on concrete. I used to do this stuff in gravel 30 years ago. Used three of these torch blades. They are tough! Maybe I didn't really need to repair this! LOL

 

Wow. I like the torch blades myself. I bet that was good on the back.

 

but atleast now it will be good for another 30 years without worry of should i have replaced them,mine need done too when i get that far seems i cant get past the front clip,just finding a decent radiator support seems never ending.

 

Remember I had to repair and upgrade this. I'm putting 300hp to the wheels.
I had already repaired my rad support, and then I cut the bottom off to fit the new radiator.

 

yeah u did a really good job of repairing ur radiator support wish mine wasnt so rusted maybe i can try to weld new metal in it,probably better than buyinbg a junk used one anyway i mean there 30+ years old there gonna have some rust,how much did u have too drop the bottom to make it fit.by the way rydeer them new rear shackle really look good on there i like the red bushings and ur frame rails look in very good condition.

 

I cut out the bottom and dropped it approx 1 inch. It isn't finished. I'll wait until I remove it and finish weld it on the bench.