The seller says there's another kit, PW350-DF, that has 90 degree boots. The kit is out of stock, but it may actually be usable.
I have no idea if the F-body cars have a different bracket setup that makes those wires work there, but for a B-body I doubt that kit would work. I want to see what the PW350-DF looks like. I could perhaps install the wires first before I install the AC/Alt bracket!