I should say it depends whether your model will be fitted with the ordinary fully enclosed lifeboat which will be launched through gravity type davits.
Here's an example of such
from the German boat yard Fassmer.
On the other hand today free fall boats or "satellites" are common, especially on smaller chemical or LNG tankers.
They need to be released over the stern by rolling down a sliding ramp unlike the conventional boats in davits which are released to the ship's sides.
I think due to the impact when they hit the water surface that the satellites are restricted to a certain height, which is often exceeded on the VLCCs and ULCCs with their higher freeboard (especially in ballast) and their high raised deck houses.
I think that you can find out the limits by studying the rules for lifeboats of the classification societies such as Lloyds Register, Germanischer Lloyd, American Bureau of Shipping or Det Norske Veritas.Here's a video
and here a spec sheet for a tanker freefall lifeboat
from a Norwegian manufacturer which at the end contains drawings of the boat.
Just search for spec sheets from the notorious lifeboat manufacturers' websites.
There are plenty out there.
Edit: Forgot to mention, Schat
is a well known manufacturer of davits.