All kits has some karakteristics. For the speed u must size the carter, and for use for octane 95-98 with a high squise the innerhead must get a larger volume.
The manston has a more fragile nicasil then other cilinders, so it's preferred to have more attention with assembling the kit, the right force, 12NM, when settling the kit and proper mixture of oil and gasoline. The head nead also more volume for regural gasoline.
The evo is the easiest of all. It has a fine nicasil, right compressionratio, and could easely pluged into the carter. The Pro Race 2 has the same advantages as the evo, but has a different port layout