They had devils and fuel blocks, but not devil fuel blocks. I don't think I'd want one for my car, but the beer tap...
Dude, I think it's a topper and it's been attached to a block hand made to match, probably outta aluminum. It's clever but devils don't scare anyone these days. Hey, thanks for the Natty Light, you freak.
I do believe that the gauges on the firewall are for tuning purposes(?) and the fuel block might be a one off piece.
That thing looked handmade to me, or at least hand painted. I have pics of the whole car if you like.