And again, if you do switch to the 73 SD fuel pump, you will need the 73 SD pump to carb fuel line as your current line will not reach the inlet on the 73 SD fuel pump as the resovoir hangs down MUCH lower on the SD pump (hence the reason it is less likely to run out of fuel at high RPMs).

Or you can always run a rubber line from the pump to carb but I DO NOT recommend this. NOT a good idea! Ask me how I know...