It's has been on their website.
2UZ-FE to H55F Adapter Kit
40 Series Land Cruisers originally equipped with an H55F2UZ-FE → H55F Adapter Kit - The Cleanest Way to Install Toyota V8 Power Into a Classic Land Cruiser This adapter kit allows the legendary Toyota 2UZ-FE V8 to bolt directly to the Toyota H55F 5-speed transmission while retaining Toyota's...
overlandcruisersmt.com