I was going to buy some brand new from GM forged stock connecting rods for real cheap off ebay and "race prep them".
This is one of those stock connecting rod only things so no after market forged ones.
There 2.8L rods for my 3.4L
I can weight ballance them to near .000 grams becsuse I have notheing better to do over here while it rains constantly.
I was going to shine them up and get rid of all the little surface things.
Shoud I sent them off to get a brass or bronze bushing installed for piston pin floating?
I was going to get some high strength bolts too fi I can find some.
What all shoud I do to get them race preped?
Who makes the best rod bearings too?

 

If possible, I'd go with the later design rods. The little 3.4 (AKA the 3400) was one of those motors that went through a lot of "evolutionary" changes over the years. Later rods were probably made better over the years. I don't know if they changed the width, center-to-center length or either end diameter over the years, but if you're using a 3.4L crank I'd use the 3.4L rods, too.

I have no firm evidence but GM just LOVED to fiddle with specs here and there over the years. Even though they are the same engine family my hotrodder's instinct tells me you're going to run into some reason why the earlier 2.8 rods don't jsut bolt onto a 3.4L crank/pistons. I can feel it in my bones.

Full floating pins are a nice thing to have. Not really for performance so much, but you can take pistons on and off in your garage without having to take them to a shop and have them pressed on and off. Just make sure you can buy pistons with grooves for the writ pin locks for that motor if you decide to go that way!! For a small block Chevy it's a no-brainer. For a 3.4 you might have difficulty finding pistons set up for full-floaters.

 

All the specs on the V6 I can find show.
5.7'' center to center
.912'' pin hole
1.999'' crank jornal
.830'' wide on the crank jornal

 

I'll ask my brother to do a sanity check on the rods for me. He's climned inside and out of the 60* V6 2.8/3.1/3.4/3400 motors several times.