Aftermarket Radio Installation - Amp integration harness?

[1989CobraMakeOv]

I'm taking out my factory radio and cd player and installing a pioneer head unit.... I've been told I need a amplifier integration harness. My question is, which one do I need

This one? (70-5510)

or

This one? (70-5511)

Thanks!

also, I’m showing the car this Saturday... Do you know if judges look badly upon aftermarket radios? I'm know it's a plus to have a factory set up in older cars, but do you think that'll apply for my 99 cobra?

 

[OzzDOA]

70-5511

 

[1989CobraMakeOv]

70-5511

Do you know if i need to buy a face plate? Or should my CD player just slide right into place. It appears to be, and should be the exact same size as the factory model.....

 

[OzzDOA]

I ordered my stuff from Crutchfield, you put in the year, make, model and they will list everything you will need to do the swap. A lot of times they have specials where the install kits are half off or even free. And yes you will need an insert to replace the space left where the stock CD unit went.

 

[Boostlag]

I'm taking out my factory radio and cd player and installing a pioneer head unit.... I've been told I need a amplifier integration harness. My question is, which one do I need

This one? (70-5510)

or

This one? (70-5511)

Thanks!

also, I’m showing the car this Saturday... Do you know if judges look badly upon aftermarket radios? I'm know it's a plus to have a factory set up in older cars, but do you think that'll apply for my 99 cobra?

Its a 99,its already bad enough these are the bastard child mustangs so I wouldnt worry about a judge looking at your radio.

 

[1989CobraMakeOv]

Its a 99,its already bad enough these are the bastard child mustangs so I wouldnt worry about a judge looking at your radio.

i don't get it.