To start with, please understand that I'm just guessing. With that said, I've never owned a factory single carb engine. But I also don't remember any factory single carb 427 of any description that used a fuel log.
I put together a 427 to put into my '67 Cougar XR7GT in 1968 and used a sidewinder manifold. I used a Holley originally designed for a race-intended 427 Cobra. It used the LeMans-type bowls with a separate fuel entrance on each bowl. I simply used a 'T' in the fuel line, which came off the cartridge filter in front of the driver's-side rocker cover.
KS