Hey!
Essentially my current road bike (EVO vantage 7.0) has a full shimano tourney set. It served fine for a while but last season I was finding myself limited by the speeds (at 2x7, I was overpedalling). Tried finding replacement compatible rear freewheel cassettes in a lower teething (currently 14-28) but to no avail.
I have found a shimano 105 r5700 set for around 300 CAD but it doesnt come with a crankset and so I was wondering whether, using the 105 front derailleur, it would be possible to keep using my tourney crank while the rest of the set is 105? (if I'm not mistaken, my current tourney crankset is the FC-A070)

I've tried cross comparing with the productinfo shimano website but I'm still unsure.

Thanks for your help.