firstly Rich, what size are your rornt speakers? If it is a post 88 cab you will have the larger pockets and bigger speakers, I'd reccomend buying a decent replacement set as the standard ones probably wont take much amplification.
I would also reccomend replacing the rear door card speakers with a good set too, and forget about the parcel shelf for the time being, as they are next to useless with the roof down (something worth doing during the winter when you will hear the benefit)
To wire the Amp in, use the thick red wire in the wiring kit, straight from the battery to the +ve terminal on the amp. Install the fused end closest to the battery (remove fuse untill wiring is finished). Then attatch the brown earth wire from the -ve terminal to the chassis, ensuring a good contact is made (scrape away a bit of paint.
Next wire the blue remote from the rear of your head unit to the "remote" terminal on the amp, with the blue wire in the kit.
Then use the twin wire with the plugs on the end to connect the pre-outs at the rear of the head unit to the same on the amp. Finally you are left with wiring the speakers in, using the thiner twin speaker cable in the pack, to the amp. Ensure the +ve and -ve connections are the right way round for better base response.
The wattage of each channel on the amp wants to be about 60% of the speaker wattage. This will prevent the speaker being underdriven, which is as detrimental to the sound quality as overdriving them.
i.e. a 240 watt 4 channel amp, will give 60 watts per channel. So your speakers probably want to be able to handle 100watts.
TBH you will probably be better to speak to an audio specialist, who will be able to advise you on a good set up. But wiring it in yourself is a doddle.
