It all depends on how much you've already done.
Do you have the proper tools for disconnecting the fuel lines? You can get them pretty cheap at a local auto parts dealer. You may be able to get away with only pulling the intake and not the fuel rails if you modify the hex key to fit in underneath to remove the screws. It'll probably take just as long to pull the fuel rails, though. Remember to put some motor oil on the injector o-rings before you put them back so they don't leak.
Be sure to reconnect your fuel pump and repressurize the system before you put the intake back on to check for leaks.
That's all I can think of for now.
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351W 89 Mustang GT Convertible