I have an adapter for running a ls6 maf on you Grand National or T Type. Its brand new from Full Throttle. It is the narrow 5 pin. It was $32 shipped from Full Throttle. Ill let it go for $25 shipped. I do take paypal.
I may be wrong but while this does allow you to connect the 85mm MAF to the factory harness the computer won't read the 85mm MAF without the translator.