Wow BASF tape... haven't seen that since my dad made me sing partridge family songs into his CB mic with a vocal zapper LOL. The chain was CB mike to Telefunken reel to reel. And I still made forts out of blocks at the time...
Don't get old Ampex 456. It's great tape but it has a problem with longevity. All of the 456 these days needs to be baked. The oxide got sticky over the years and gums the tape deck up. I have to bake that stuff to do transfers to digital, Quantegy is the same stuff I believe with a more long lived formula. I haven't needed to bake that. Other brands didn't have such a problem.
I use a converted dehydrator to bake it. I cut out the centers to hold 3, 2 inch reels at a time.
7 inch reels will slap right on your 34. So get them. I think the 7's last like 15 minutes at 30 ips. If I remember correctly. I haven't turned mine on in a couple years. I think the 10.5's last 25 to 30 minutes?
Think the 5 inch reels are what my dad used to use on the telefunken. Too short to bother with at 33 ips or 30 whatever it is. But I suggest always recording with the speed button on high. Keep the heads clean with alcohol and get a demagnitizer. Hmm and not to mention a test tape, oscillator and stuff to calibrate it. And record test tones in case you need to bring the tape somewhere else.
And Gary suggested new tape. If they sell it I would get that for sure.
John