UP gas turbine MU with diesel

I found a reference on Wikipedia that the UP gas turbines were some times combined with diesels.

"UP 61 was used in MU tests with diesels starting in 1958. These tests were successful and eventually 19 of the 25 4500 hp turbines were equipped to MU with diesels"

I have looked but can find nothing indicating which model of diesels were used. If anyone has any information that would be appreciated.

Thanks,

The 8500hp "Big Blows" could MU with diesels. Here's a picture of #6 with a GP30 trailing:
http://www.railpictures.net/viewphoto.p ... 51&nseq=22

And #30 with several diesels MU'd, including a couple of GP B units:
http://donsdepot.donrossgroup.net/dr1005/up30.jpg

Not sure the first generation turbines were able to MU with diesels, but this picture of #55 seems to show a diesel behind the fuel tender:
http://donsdepot.donrossgroup.net/up55.jpg