mysterymotor

Need sum advice 82 cutlass v8 starts right up.give it gas backfires or pops and will shut off but only shuts off if it’s n gear! it can idle all day rev it up whatever as long as it’s in park! You take it out drive like 3 min or hit tha gas hard it pops! Or backfires and dies put it in Park...

First build, never gone through the emissions process before. This is my first car lol. I have a 78 monte carlo with a 69-80 350, unknown cam, with a 600cfm carb. It has unknown longtubes, true dual, to glasspacks. Will i need cats for 78? I live in larimer county, and apparently i need to pass...