I have a strange body type - large biceps/triceps but scrawny forearms. Large glutes, thighs but scrawny calves.
My calves are long and always looked underdeveloped but they've always been very strong. I've worked them in the past with very little results but have grown them a bit with Prowler pushes.
I do two kinds of Prowler pushes....lighter weight sprints that give an ok calve workout and heavy weight slow walking where I take large steps and really contract my calves on every step. This leaves them burning like crazy and has resulted in them developing nicely. Since doing this (and working my legs in general) at 6'5" I can one hand dunk a basketball again.....used to me able to two hand dunk without a running start but that's going take some more weight loss