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Modern formulations of gasoline are much less stable than the old formulations . If you Search you'll find it is useable for no more than 1 year which is probably why San Rensho and the other smart guys suggest changing it -yes you need to drain & purge it all out.
Don't be surprised if you find it has some gelled fuel in the fuel filter and/or the fuel pressure regulator.When the gel reaches the regulator or the injectors it may cause problems that are real time wasters.The injector filter basket mesh size is so small that gel will plug them. So it is probably smart to drain and purge all the old fuel.
Just jumper the fuel pump relay and use a 15A(Max) fuse and switch. Maybe Post and ask for more specifics.
Before you start it ,try to turn it over at the C/s pulley nut(24mm) to make sure there are no stiff spots. The after-the -rebuild starting procedure is probably helpful. Short bursts on the starter with the fuel pump relay removed.
Also Search for "Initialization" .This essential procedure will prevent all sorts of problems with the keys/imobilizer/alarm/windows and top.
None of this applies to older cars and it is a real nuisance to have to do all this prep but those who who rebuild M96 engines learned the hard way and shared these ideas with us. I was certainly grateful for their recommendations -it certainly helped me with starting my M96 after I rebuilt it.
Good Luck with the resurrection Expect lots of DTC's and I/M Flags !
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