Need measurement for accessories please? Between fenders and frame rails please

[uhcoog1]

I need a couple measurements please. Truck is apart at the painters.

For those with an LS swap- what is the distance between the frame rails at the front edge of the accessories? And the same on the fenders please around 3-3.5" above the midpoint on the crank (in below pic- where the PS reservoir sits).

Trying to determine if the gen 5 accessory drive from Holley will fit. See below. Any help appreciated!

Thanks guys