When you do a carb install, directing heat to the area below the carb is a must. Accomplish this by running a tube from one exhaust manifold to the area below the carb to the other ex manifold or run heater water flow through this area.

If the carb is too cold, you will have major running problems in colder weather ( like 50* F and high humidity. )

You may get poor mixture distribution running a carb on a FI manifold. And, carbed V8 manifolds are usually dual plane where 2 cyl from each bank are connected to 1/2 of the carb. This helps low speed performance.

Check the intake port spacing, you may be able to adapt a USA V8 intake will less fuss than making something from scratch.