Which size flywheel should I get for my 440 with an 18 spline 4 speed??

69 RoadRunner (clone)
70 Cuda 383 4 speed (project)
70 Cuda convertible 340 4 speed (project)1 of 88
70 Barracuda (project)
71 GTX 440 4 speed (project)
72 Cuda 340 3 speed (project) 1 of 25