h.e.l.p.....overheating

[f00g00]

water pump? obstuctions in the block? new radiator cap?
Might be a chance the motor was rebuilt before and bored out, that would make the walls thinner and it would be harder to cool.
Maybe an oversize radiator would be a good idea. I live in kuwait where the temps are hot and I had a custom 3 row radiator made and my car runs cool all day where before it would get hot in the summer with the stocker 2 row.
How is the airflow through the front grill while driving?
The under cover is a good idea to keep on the car. I hit a puddle one time without it and my motor quit cause water went everywhere in the engine compartment. I had to pick it up after work and it started right up.