Exactly, my old man flew the Combat Talon I when he was assigned to MACVSOG, the MC-130E had 400 lbs of radar absorbing "paint", the Fulton recovery system, and a slew of highly classified electronics...
It did NOT make the C-130E a fifth gen fighter in terms of RCS, but it did make it much less likely to "paint" a huge target as it went about its very classified and clandestine business.
That black radar absorbing coating turned the beautiful C-130 into a frumpy looking lump, but it did the job...
By the way, the MC-130E made many trips into China, most at very low altitude, some at very high altitude, it had terrain following radar to allow those trips to be made in the dead, dark of night....