Found a car on craigslist, on the fence of getting it

He stated it runs but not to great, Hasn't run good since the tune up he did. Probably has the firing order wrong or the carbs need to be rebuilt. He doesn't seem to be much of a mechanic.

Even if so I will tear the motor down some to check bearings/lifters. If they are worn I will do a basic over haul on the engine. I hope to see 340 on the block instead of 360