Apologies for the slow response to this, did not have the time yesterday evening to get around to it.
Both of these classes survive as part of the 'what-if' in my Alternate WNT scenarios (which are available here, I have reuploaded and fixed all their links as of a few months ago), though their fate varies a little by scenario.
In most of them, Amagi/Akagi are both completed as CVs (no Kanto Earthquake or reduced damage in that timeline), whereas Kaga/Tosa remain as BBs. Lexington/Saratoga are completed as CVs, whereas Constellation/Constitution are completed to a modified (as in slightly less 'glass cannon') BC design.
The exception is the Ultimate BB scenario in which all of the above are completed as BBs/BCs respectively, and so its probably your best source for art and numbers on them. Here are the editor pages for them.
On the CLV front sadly I can't help, as carrier progression for the Japanese in these typically follows the Conversions/Hosho -> Shokaku (enlarged Hosho) -> (Soryu/Hiryu type CVs) pattern. The US does have a CAV with 2x3 8in in the Ultimate BB scenario, but I forget exactly what design it was based on.
Japanese Amagi class BC, following a refit/reboilering in mid 30's;
Essentially a faster, slightly less armoured Nagato with more firepower. Rather good fuel efficiency for their size, along with a heavier AA suite (more deckspace) make them ideal CV escorts. In this timeline the Japanese have a 40mm in limited production at the start of the war, but for a historical variant I'd probably go with 3x3 and 4x2 25mm per side (comparable to Yamato as built).
US Lexington class BC, completed to the 1919 design posted above and with additional belt/turret armour (as they were still under construction, the US argued they could use the Part 3 Section I-5d 'additional armour' clause partly for this). Slightly modernized in the mid 30's;
Again, another class that makes an excellent CV escort, though despite the high durability, the belt armour is still rather lacking. Like the other older US classes, this one isn't quite as fuel efficient as the newer fast BB's. They do have quite a bite though as the 16in/50 Mk3 with the 2240lb shell has the highest penetration of any US gun.
Lexington rebuild (based on the West Virginia modifications);
Only modest armour upgrades (deck armour is heavy!), main focus on AA protection and some anti-torpedo protection to enhance their role as close escorts for CV groups.
Theres a lot of other stuff (artwork and designs) in the AltWNT pack, as usual feel free to use what you want, I'm happy to explain anything if required.
< Message edited by JuanG -- 6/10/2014 4:40:20 PM >