Car getting real hot....

MAPS said
Well the engine was removed changed cam the heads were redone asking with that the crank was changed only things used were the pistons add the engine had been rebuilt original a few yrs earlier but had really low mileage (less than 3,000 miles) after having a problem with a lifter dropping I decided to take the engine out and redo it the way I wanted to, lime I said different cam, heads, lifters, valves etc.. The only part that remained the same were the pistons and the induction,
The car never went above 160 before that's why I was thinking, maybe the water pump went ?
Thanks.
MAPS

Partner you may think that the engine is the same as it was before you rebuilt it, but the fact is appears you replaced the majority of the major components.
Heads, cam & lifters, crankshaft and related parts I dont know if you had any machining done to the block, hell, just changing the heads and head gaskets could/will alter your original C/R having a dramatic effect on cooling.
You just did not do a Dupont rebuild of your engine you changed it alot.
I'm not surprised that it performs differently.