I won't say it will or will not work, but will say this. There are always parts that will work, but not to design specs of furnace.
C40-70 = cut off in 40 - 70 seconds.
C40-110 = cut off in 40 - 110 seconds.
Therefore, it can run an extra 40 seconds and this will change temps inside furnace.
The limits are matched to the timing sequences of designed components and changes can sometimes interfere with that.
My problem with it is this. He "could" have easily got the right part the first time and easier then on 2nd attempt.
IF it is installed and does not work or works, but later starts having problems, it cannot be returned then.
It is always recommended to always replace sequencers with like parts or if different, only after manufacturer recommends another part as the replacement.
Just my take, he has his way and I have mine and you unfortunately are caught in the middle choosing.
Because I'm not there and the fact that the exact part could have been ordered, but wasn't, best answer I can give.
Sometimes they fall within range and all is well, but not always.
If it cross-referenced, should be ok, but again, I'm not there and didn't order it or check cross-reference.
Please let me know how it goes.
Take care and best wishes,
Some people are Humbly Grateful, while some are Grumbly Hateful.................... Which one are you ?