Which fuel pumps to use in a 1976 930 w/ a 1986 3.3L CIS European Fuel System engine?

I wanted to ask for your help about which Fuel Pumps to put in my 1976 930? My 1976 930 has a 1986 3.3L engine with CIS and a European Fuel System. The car has run great for the 20 years I’ve owned it with the original/1976 front and rear fuel pumps in it but, both pumps started leaking at the same time.
You probably know that the 1976 930 uses the same exact pumps in both the front and rear - model # 930-608-111-01-OEM but, these pumps are virtually non-existent or extremely expensive if I can find/get them.

At this point, my mechanic found 1977 930 fuel pumps and wants to put them on the car.

My question is, since the car is a 1976 930 with a 1986 3.3L CIS European Fuel System engine in it, do you think the mechanic should be installing fuel pumps for a 1986 930 instead of a 1977 930? The car doesn't have anything on it that is 1977.

Any help or guidance would be GREATLY appreciated.

 

I would use the later pumps. Post it over on pelican, somebody there would know for sure.

 

If your replacement 930 pumps can match the fuel delivery specification of your early pumps, you will be good to go.
The factory workshop manual indicates this fuel delivery specification, delivery volume measured at the discharge point of both pumps; minimum fuel flow
1,170 cubic cm/ 30 seconds.