Overheating

I need some help.I have a custom 41 Ford coupe with a 70 455 Buick engine. The engine sits fairly high in the chassis. The radiator is a new Northern 16 x 26 alum. we are having overheating problems, We know that the engine is good and everything is new in the cooling system. The distance from the water pump to the lower radiator hose is 16", is this to far? If so what should it be? I am using a 14" fan pushing through the front. I removed the shroud at Northern suggestion, it helped but I am still overheating. It just took longer to get hot. Any help will be greatly appreciated.
Thanks, Bill Rolland

 

Retart your timing you may have it way advanced

 

push fans dont have nearly the cfm as they do if they pull. I would put the biggest cfm pull fan you can with a quality shroud. Radiator seems dimensionally small, how many rows does it have?