WHAT IS THE LITTLE METAL BOX IN A 74 260. IT SAYS IT IS REALLY EXPENSIVE BLA,BLA,BLA. IT REALLY DOSEN'T TELL ME WHAT IT DOSE. IS IT A SORT OF STOCK IGNITION BOX? OR THE FIRST COMPUTER FOR THE EMISSIONS? PLEASE HELP. I WANT TO DITCH IT BECASE I HAVE A NEW MSD IGNITION.

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