The later Bosch Flow-Through Fuel Pump is a FAR BETTER option for your 75 911. Our host has this pump for around $150 if I remember correctly.
This Bosch Pump can also be installed on earlier 66 - 74 models using this hose routing above the rear crossmember. It eliminates the
Hose clamps and multiple Steel lines Under & Through the Frame rail.
There are additional postings about this later pump upgrade here on Pelican.
I have made up a number of these upgrade hoses, all in E85 Rated hose that will last for the lifetime of your 911.
For more info, please email me.
len.cummings @ verizon.net but without the spaces.
Good luck.
Len