Megarange FW question(s)

Have an old rear wheel with a Suntour Accushift 6 spd freewheel.

1) Will a Shimano 7spd Megarange (13-34) fit?

2) Any chance a Shimano triple road rear derailer will work (considering the
34 tooth sprocket)?

3) If no to 2), I have a Tourney MegaRange, adapter claw version, handy -
will this work on a dropout with a derailer hanger, or will that get in the
way?

Thanks,

Kyle