I need a new pair of cylinder heads on my 92 3.1 due to exhaust manifold bolts broken off. What do I need to take into account before doing the swap? Can I use same pushrods? Lifters? I will be getting a pair off a 3.1 or 3.4.

 

You could just drill out the broken studs. But all gen 1 60 degree V6 heads are the same, so any parts external to them will be able to be used.

 

So should I use the pushrods from the donor car or my car? All I would have to do is set the valve lash right? What about lifters?

 

As long as you are using Ironhead it does not matter with pushrods you use.

As for lash. You tighten down till you reach zero lash. That's where you can just barely feel resistance when spinning the pushrod then tighten the bolt a additional 5/8 to 3/4 of a turn for the preload on the lifters. I always went with 5/8ths.

Always be sure that the valve you are lashing in is closed!!!

 

http://www.ebay.com/itm/GM-2-8-3-1-3...JWfElo&vxp=mtr

be sure to use new head bolts , and u need to run a tap threw the holes on the block to clean the threads or u wont get proper tq readings