The 524D4
I think I can help there...
RB211-524D4, D4-B
Max Take Off 51,980 lb
Max Continuous 47,320 lb
RB211-524D4X, D4X-B
Max Take Off 52,810 lb
Max Continuous 47,320 lb
Thrusts at Sea Level Static conditions
Hope This Helps
Edit Time :
NB : Nothing much to add in the G/H front, except I believe that the G/G-T thrust rating can't be used on the B767. If G's and H's are both fitted to a B747, the H engines are down-rated to G thrusts (to prevent thrust asymetry.)
On the -T upgrade, the improved performance also means lower typical operating temperatures, which gives a longer component life.