Strength and strength endurance are at opposite ends of the strength continuum, so here's a thought...
Prioritize your maximal strength training and you will improve both strength qualities.
Here's why...
Each time your maximal strength improves, prior weights become a lower percentage of your 1 rep max (1RM). You can usually do more reps with a lower percentage of your 1RM.
For instance, If you can do 10 reps with 75% of your 1RM...
1RM = 270, 75% = 202 x 10
1RM = 300, 75% = 225 x 10, 67% = 202 x 15 (?)
You just increased your strength endurance.
Start adding weight to your chins in the 3-6 rep range for 3-4 weeks and then retest your max reps on chins and you'll see what I mean.
Use push-ups as extra workouts to increase work capacity and to promote recovery from heavy pressing workouts. These workouts should be brief (10 minutes) and follow the main workout by about 4-6 hours.
You may also find this article helpful:
http://www.prperformance.com/maxing_...s_and_dips.htm
Hope that helps.
Bill Hartman, Level 371 HARTMAN certified