How to reset timing in GMC Jimmy with a 4.3 V-6?

Answer 1

The first problem was that for some reason GM decided to put two grooves on the balancer. I was alighning the first one that I saw. I went over to look at the old engine and realized that the 2nd one was actually TDC.

I then, pulled a plug and had one of the guys roll over the engine while I controted myself around to get a finger over the plug hole to make sure we were on the compression stroke.

When that was all done, here's where things get tricky and don't make sense. In normal circumstances, I would have lined up the rotor with the #1 plug. NOT ON THIS ONE!

Line it up with number 6! Why, I don't know! It fired right up and the idle smoothed right out. The worst part was getting the oil pump slot in the right orientation.