I had an early Rolleicord with a Triotar and it was an interesting lens, much more capable than some suggest. Very nice for portraits, I used up the last of the old E4 film a friend gave me with mine, we'd already switched to E6 commercailly , the results were wonderful. So have fun.
Do you by chance have any scans from the E-4 with the Triotar you can post? I would love to see. I bet they were terrific!