Between the 3 owners and Oil consumption problems with some GT350 engines I would go through those service records with a fine tooth comb.
If any service time is undocumented or the records are not detailed I would insist on that warranty be included with the purchase price.
That's not true. I've heard on the web the Ford sub amp is rated at 75 watts (I intend to measure it soon). So with a 4 ohm sub, the amp needs to deliver 17.3 Volts RMS at 4.33 amperes. Verify by Ohms law, Watts = Volts x Amps or 17.3 x 4.33 = ~75 watts
To get the same 75 watts at 2 ohms...