What position on mounting plate should I use

[tinsoldier]

Sorry this might be a stupid question. But what position should I be using in mounting the plate for my LSx swap. I ordered a mounting plate from Ebay. They had 3 options. I seen other that are adjustable with multiple mounting holes. I am trying to minimize having to move the engine around too much by getting an idea first.

This is a 2005 5.3 into a 71 c10 with air conditioner and power steering. Should I stick with stock locationg, 1/2 forward, or 1 3/4 forward. I am planning to use my stock radiator.