Paul;
I have seen this same motor in a number of track and street cars and I think they are a very good motor.........
Now with that said, I would definetly have to inspect the engine and check a few things before buying any engine that has been "sitting" for five years......I have seen new engines "freeze" in as little as 2 years.....I would first give each cylinder a good sqirt of WD-40 or even motor
oil and then see if you can turn the engine over by hand, I would also pull the valve covers and watch the valves/rocker arms while doing so to see in any valves are stuck as well and the lifters..........if that works out, it would not be a bad idea to pull the distributor, connect an
oil pressure gauge to the motor and turn the
oil pump with a drill and see what kind of oil pressure it will produce all the while making sure it is getting oil to the lifters and top side of the motor............
If all that checks out, you should be o-k..........
David