There are other books on building the Kents, I am surprised Pegasus is out of it.
There is Peter Wallage's book, which is occasionally found online and when, is fairly expensive. Ive seen it for $1,000.00 on Amazon when the availability was very scarce. But Ive seen it available for less more recently. It is a decent assembly book geared more towards the bench top home builder. For a tear down and rebuild of the same engine and parts, its adequate. Jakes book is more technical with tricks of the trade. Its good, but $130 good? I hate to see you pay that when Pegasus will probably get more prints eventually.
Honestly, If you found Wallage's book for $100, get that and cancel the Lamont book. I can hook you up with scans later.
https://www.amazon.com/Rebuilding-Tuning-Fords-Crossflow-Engine/dp/1850109389
With the various Haynes manuals and some Ford repair manuals, you gan get the basic information. Retro Ford magazine has had numerous articles on building and tuning the Kent based engines. Too bad they don't have a good library to search. Ive contacted the publisher and they didn't keep track of where those articles were.
There are a few sites dedicated to the lump:
https://thekentlives.com/tech_engine.html
There is a Face Book group, X-flow tuning.
I do wonder how different an alloy Cosworth Kent block is to an iron Ford block? Are main cap and head bolt torque values different from iron?