I am fortunate to have never torn a triceps tendon. But I did rupture a biceps tendon in 2001, necessitating the bone-drilling type of repair you mentioned. So I have experience relevant to yours.
Frankly, I don't know whether your strength will return to its prodigious pre-injury levels. I am confident that, assuming your surgery was successful, you'll be able to return to training hard and successfully. And it's on this topic (ie, your future training) that I'd like to comment. This is because there was, presumably, a fundamental flaw in your training style that led to your injury. That is, something about your training method led to the catastrophic injury you suffered (and I have a hunch as to what that was). And if you go back to training in the same manner, odds are that you will suffer another significant injury.
Looking back at my pre-injury style of lifting, it is painfully obvious what the flaw was: I was overworking my biceps, and this ultimately led to my catastrophic injury. Importantly, by 'overwork' I don't mean I was doing too many sets of curls, or going too heavy on them. Rather, I'm referring to my bodypart split, which involved significant biceps stimulation every day. Day 1 was Back (heavy pulling) and Chest (heavy flies). Day 2 was Shoulders (heavy upright rows) and Legs (heavy RDLs). Day 3 was Arms (duh). In retrospect, it's little wonder my biceps tendons ached for years before one of them finally gave way.
In this regard, I have a strong recommendation concerning how you organize your lifting: Set up your split so as to give your triceps (and biceps, for that matter) the maximum amount of time off that you can. Divide your exercises into those that involve the triceps vs those that involve the biceps. Note that this is not as simple as, say, 'Chest day' and 'Back day.' Whereas most Chest exercises do involve the triceps, some involve the biceps (eg, flies). Likewise, most Back exercises involve the biceps, but some are triceps-dependent (eg, pullovers; straight-arm pushdowns).
In designing your split, your goal should be to group all the triceps-dependent exercises on one day, and all the biceps-dependent exercises on another. You then want to ensure that your tris and bis get as much 'down time' as possible by not stimulating them at all during any other workouts. By doing this, you will allow your triceps and biceps tendons more time to recover, thereby reducing the risk of future injury. If you're interested, I could expand upon the sort of split I'm taking about. Best of luck staying injury-free and reaching your goals.