1991 Ford F-150 cranks but won't start?

Battery got hooked up backwards, this is what I've replaced so far; Solenoid, Starter, Coil, Distrubutor cap, ICM, Spark plugs&Wires, Fuel Filter. I've tried using starting fluid and used a different battery and didn't make a difference, it cranks over but doesn't fire up so would the computer and pick up module need replaced? Any things I need to check or do to help solve the problem? I like to get it running soon.

OMG, do you know anything about cars? You blew a fuse or fried a fusible link dude.

Put gas in it

Check for spark, check the ignition coil, check the pick up, check the EEC power relay and check the fusible links.

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