I have a oil leak some place it's only on rly cold starts and runs down the front diff but it's not the oil pan or in the valley and one got some ideas would be help full

 

It is probably your oil cooler. The seals tend to leak when the oil is cold and at its thickest. Using your block heater will most likely alleviate that until you can replace the seals. However it's always a good idea to check around and eliminate the valve cover gasket or any other oil component on that side.