65% chance of it running well and lasting for you. 35% of a long list of issues, the least of which is not as much power as advertised, the worst of which is lower end issues Mopar will not stand behind in any way right out of the box. With a cam change, you can void the warranty and get a long block from a mass rebuilder that wont last longer than a year or two, for 1/2 the money of the MP part that has no warranty. I hate mass rebuilders, but I'd rather pay less knowing it's going to be bad, than pay more hoping to beat the odds. Best situation is a properly rebuilt engine from a reputable place. Preferably local so you can see the work they do.