I currently have a 302 with a mild cam, short header and the Holley 2300 2bbl which would be the best and economical electronic ignition to run?

A good choice would be either #6103 pro billet or #6135 stock look distributors depending on the look you are going for. https://www.wildhorses4x4.com/pertron... https://www.wildhorses4x4.com/pertron...