Exhaust issues on an 82' SWB

[ECU PIRATE]

I recently purchased an 82' SWB. Some of you may have seen the post " Project Brown Hornet ". It has what I thought was a non original Olds 350 motor. After some research by myself and a friend, we have determined that the motor is actually a small block Olds 260 V8. I need to replace the entire exhaust system to pass my state inspection here in Va.

Since this was orginally a Canadian made V6 truck with a factory equipped catalytic converter, which catalytic converter should I use? One for a 250 V6 ; one for an Olds 260 V8 or; one for a 305/350 Chevy? I am interested in running one of the cat back dual exhaust systems offered by LMC but, I am unsure if this set up woulf fit with my current motor situation.

Thanks,
Mike