Why are the big bore 440 kits so bad??? I hear most people saying they are unreliable and others love them. Whats the Deal???

 

I think in general people love anything they own. So if you talk to someone that has the 440 big bore kit they say it's awesome.
I've heard they have problems blowing head gaskets. I can also tell you there's a guy around here, I can't remember who, that says he was disappointed with the power to $$$ ratio of the 440 kit. In other words said to much money for what he got.