Shoot..... I think that the Type 3 pancake-style cooling is head and shoulders over the type 1, including the larger, post 1971 fan shroud version. We don’t use it because it looks weird AND it needs the T-3 body wrapped around it to work well.
It is especially effective because of the T-3 body changes made allow it to pull carburetor-only air in from the driver’s side louvers along the body (I’m thinking squareback, here) or behind the rear window on a notchback, and cooling fan only air from the passenger side. Each side of louvers was larger than our 356 grill area, so there was twice the air pouring in to the car. Then, there is some internal ducting design that serves to direct the air such that it accelerates the airflow the faster you go - A “ram scoop” as it were, but that’s all part of the T-3 body and something never seen on a 356, designed 30 years earlier.
I don’t see a lot wrong with the OEM T-1 fan system after 1971, but I see a whole lot wrong with the Speedster replica bodies trying to cool engines larger than 1776cc and many on here have learned not only how to live with those limitations but how to conquer them to make our cars far better than before.