what should i look for? the owner says the transmission is messed up but it runs fine.. is there just anything i should look for to know if it was installed correctly?

also how do i tell what pulley it has on it? will there be marks?

Stock is black and made of steel. Aftermarket pullies will usually marked with the size ad you can tell if its aftermarket if it has a 4 or 5 bolt hub on it. Aftermarket pullies are bolted on a hub and the stock one is pressed on the charger shaft.

The trans isnt that bad if you have basic tools and know how. I picked myself a coule spares at a local pick it yard for like $90 each.

i believe it has a 2.9 on it, also the injectors are green top fords and has stage 2 comp cams. the injectors should not be maxed out right?