You might get the 105%, but to be honest it seems that most of the sets are very easy and then suddenly hard at the end. It is easier for me to put that into poundages.
Lets assume you start that program with 500 1RM. I don't know what you are actually using for 1RM, but its OK for discussion.
Week 1 is: 5×250, 4×315, 3×340, 2×390, 1×425. With a 500 1RM I can't see this being too demanding at all.
Before the day with 105% (week 4) there are only two sets at 90+%.
Week 2 to week 3 you jump from 440 to 490 without having done a lot of "work" sets at any heavy weight.
I think that for only 4 weeks you could go higher reps on the heavy sets, then bring it down.
6×50 4×60 3×70 (4-5)x85
6×50 4×60 3×70 (3-5)x90
6×50 4×60 3×70 (2-3)x96
6×50 4×60 3×70 (1-2)x(102-105) (1-2)x(102-105)
As you say I would go by feel. If you get 5 reps at 85 in week 1, then add a little more than 90% in week 2, if you are on the low end of the rep ranges listed add a little less the next week.
Either way I'll be interested if you hit 105% as well as all the track work.