Anybody running a 100amp alt on their race car?

Last race season my car was having a hard time starting after racing at night.I have a stock 1 wire alt(60amp) running an electric fuel pump,electric fan,electric waterpump drive.I notice my alt gauge drop when I also run headlights and tail-lights at night.I,m thinking about upgrading to a 100-amp alternater to help with the extra load while night racing.Do you think this will cure my issues?

Oh engine is a small block with eddy heads.