the best thing to do is to find a older trigger plate, that has a slotted timing plate and use a timing rod that is a "circle" and not a flattened rod. use a stock 99 4-way switch and not a Bomb or Quickswitch or any short throw 4-way. you will also want to adjust the sear lug so that the hammer drops before the switch is activated.
if i understand what you are wanting, all you have to do is set the timing to be on the ultra-conservative side. you are basically wanting to do the opposite of what everyone tries to do.