I got this car from a family member. He had blown the engine and back in the day the dealership he got it from bored it out .40-.80 he says. Does anyone have any insight to the effect on horserpower / torque this has on the new rebuilt engine?

Also i have to get a new CAT on it. Any suggestions? I recent got the car running again after it sat for over 10 yrs and had not started in over 3. IT runs good considering. Sounds good with an open cat.

Exhaust suggestions please. Also anyone run a straight-pipe on the 3.1L with a CAT.

Any chat is appeciated. Thanks.