How much does temperature affect motor?

So then it's back to the carb for the cold running and probably the carb but still could could be ignition when hot.

Just out of curiosity, just in CASE it's an issue with my ignition system getting heat soaked or possibly something else. How would I test if my coil is weak in general? and is my coil mounted in a good spot? In the picture I posted with my carb, you can barely see that I have it mounted on a bracket towards the back of the engine close to the distributor. that bracket is bolted to the intake and I made sure that besides touching that bracket,the coil would be touching nothing else