I don't know by part number, but the HP trans usually has the 4-pinion front planetary gear and 4-clutch front drum, and some non-HP just have 3-Pinion, 3-Clutch Drum.
Not sure if the governor is a different shift point.
The parts interchange, so no problem upgrading a low performance to HP specs.
If in the budget, Bolt-in super sprag and Billet front drum (5-clutch) are great upgrades for safety and performance.