2949015 Radiator with 78 360 motor.....needing hose numbers.

I can't find this Rad (2949015) in the listings but believe it's for a 225. It's been modified to have the outlet on the drivers side for the 360 water pump.

I do not see any modification.

Slant radiator was set up for hose connections offset to the right.
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You say the engine is a 360, with pump inlet on the right. So yes you can get away with using this radiator.
What you realy need is a parts store that has the hoses hanging.
When I got my car (67) it had a later square tank slant six radiator.
I have one note scribbled saying the connections were 1.5" diameter and the length needed is about 20"
Anotehr note that I later used upper hose 21202 with 1.75 to 2" cut off from each end. That's probably a Dayco number.
I can not guantee the later square tops put the connections in the exact same location as the bubble top radiators.