Ohms and WPC???

Wanted to add does it matter to the amp if it runs at 8 ohms or 4 ohms???

Most higher powered amps will not be affected by dropping to a four ohm load. Generally amps output ratings double as the load halves but that is not always the case. A four ohm load is not usually difficult for and amp to drive. I don't think in your case it would make any difference, unless there is something about your amp that I don't know.

Depends on the amp in question.

Depending on the amplifier. If the amp has an output transformer than theoretically it delivers the same wattage to the both loads if the transformer designed so.
If the amp is direct-coupled and has also rating to lower wattage(s) than it's also OK to take lower impedance speaker.
Usually direct-coupled SS amps are even better with lower-impedance loads and cripples on the high impedance loads. The opposite with direct-coupled tube amps(OTL).