Hello,
the 74ACT series is fine but a litle outdated. I'm looking for an 74ACT374 / 74ACT16374 replacement which provides about 35% shorter setup and hold times. Key features TTL input (chip ist driven by a 3V Channel link receiver DS90CR482), synchronous data storage, tri state output. One option maybe to reduce operation voltage of the section to 3.3V if this helps to finde a neat replacement.
Best Regards
Martin Liese