Original type wiring harness with HEI

[62lwbc10]

Hello all, I am looking to re-wire my 58 using the original type harness that Classic Parts sells for 200 bucks. Im not running any aftermarket electrical stuff (power windows, A/C, rasio, etc), so I figured I would use the original style harness they sell (no fuse box, everything is fused at headlight switch).

I have an updated modern motor with an anternator so they have a version of the harness for this. The thing that is confusing me is the fact that I have an HEI distributor and the harness as-is is meant for a coil type original distributor. What kinds of mods to the harness will be needed to be able to use the new harness with the HEI ignition? I assume its possible since the truck now has the original harness, but the wiring is all homemade and a mess and I cant make heads or tails of it. SInce i have HEI, should I use a mode modern type, fuse block type of harness? Im really hoping to use the original type harness but now am confused. Please let me know your thoughts.

Thanks,
Mark