before and after you could have cats or no cats in canada. depends if built in canada or USA.
USA had stricter emissions, even in the 80's. We still didn't put AIR pumps on our cars in the 80's. Only in 88 did we start caring.
As for the tune, how is a tune seriously going to fix the mere fact that he's running too small a pulley with no other real modifications?
Unless you drown it in fuel and remove all of the timing, but thats just stupid.
I keep asking this, but GPF keeps assuring me that tunes are magical.
You know what I've found was magical? An intercooler. Literally nothing mattered with one of those.
But a tune? Had one by one of the most respected 3800 tuners. Wasn't anything magical.