ok building after blown pistin lol to much boost on stocklol  anyway have everything but pistions ,now people are telling me to go with je 8.1 or wisco 8.1 and then the guy at the shop says that the turbo talon pistions should work fine (he has a brand new set not oppend) and after i purched all the rods crank turbo and such i am comming up a bit short . i am sticking with stock bore cause when i send the block over i was going to sleve it .so my question is if i stick with stock bore,what pistions can i use . i am leaning tward je yet will the talon ones work and if so whats the compression...and just to add if u have part numbers that would rock...thanks all   

the 4g63 block and the 420 block are completely different save the displacement.  Why would the pistons be the same?

The guy is trying to make a convenient sale.
I would do more research to find out what pistons will be right for your setup.  I take it you bought the car already turbo'd?

if you boost, you must build. if you blew the pistons with the amount of boost you are running you need to either tone down the boost or tune up the engine.