Too good to be true??

Ok well I have ran into a guy with a 360 build he is trying to get rid of. it is supposed to be straight out of the machine shop etc. I will call in the morning to talk to the machine shop guys and get the parts lists etc. One thing that worries me is the 50 overbore on the cylinders. Would I be asking for overheating probs and other problems down the road. The car is going to be a street car and the guy that had this motor built was going to make a bracket car out of it.. What you guy think bout the overbore? I will be running a aluminum radiator and elec fan more than likely.