mass air 87GT conversion

[greydan]

Confused about speed density to mass air conversion.
From what I read, (advertising) you can use a 19# mass air meter, and a conversion harness, and convert a stock '87 GT air-density to mass air..using the stock computer .
Is this a workable project, does it work, and has anyone done it?
I'd like to save the $$ over buying a new conversion kit, but spending $100 (cable and used meter) on something that is half-baked is hardly wise either.
If I upgrade my cam, and headers on a rebuild, will the stock computer handle larger injectors and a larger mass air meter?..(if this kind of conversion is possible in the first place)
dazed and confused in Mustang land <g>