I ordered some 7 speed Sora shifters for the 1987 Schwinn Tempo. I will need to get a new 7 speed Freewheel and want to maximize my gearing as best I can with as little changes as possible.

This is my RD

Name: Shimano RD-1050, 105
Brand: Shimano
Primary Group: 105
Model: RD-1050
Years: 1987 - 1988
Country: Japan
Weight: 257 grams (avg)

From Velo base I have that as a 28 tooth max rear cog and 26 tooth max chainwrap. I would like to go up to a 14-28 Freewheel, which puts me one over on the wrap with my 52/39 chainrings.

Will the RD take that +1 tooth chainwrap from its spec? If not, would this be a good replacement? It would give me the option of going up to a mega range if I chose.

Tourney TX51 Rear Der.

Second question, will the FD work with the Sora shifters?

Thanks