I used the T-bird brakes on my D44 as well. I found that I had a really long pedal afterwards due to the larger volume of the calipers. Ended up swapping to a F250 master and brake booster. Don't just swap to a larger master as the pedal will feel firmer, but you'll lose pressure.
With my 35's I can be on a 45 degree decline and the brakes will hold. With the stock 1st Gen brakes it would just slowly roll through the brakes
Your profile says you live in Cali, but you have an Arizona plate. Which is it?
I used the T-bird brakes on my D44 as well. I found that I had a really long pedal afterwards due to the larger volume of the calipers. Ended up swapping to a F250 master and brake booster. Don't just swap to a larger master as the pedal will feel firmer, but you'll lose pressure.
With my 35's I can be on a 45 degree decline and the brakes will hold. With the stock 1st Gen brakes it would just slowly roll through the brakes