Oh god. I went through this years ago when I was forced to run hypers on my 4.1. I couldn't find ANY spec on the offset and measuring a bunch of factory assembled sets didn't yield any consistent data. I ended up spending forever mocking up and measuring, and mocking up and measuring.....
Ended up using a beer bottle top to act as a stop when I did the press fit. Basically I'd have an abandoned Scunci that some chick left here (to mark her spot) to hold the bottle cap over the pin bore. Pull a rod out of the oven, facing a certain way, then slide the pin home until it recesses in the cap.
Now it's less trouble just to float the stock rods and stick them together. lol