Orthopaedic system and method for assembling prosthetic components

A surgical instrument system, comprising:

• a base including a mounting platform,
• a first carrier including a mounting block configured to be selectively positioned on the mounting platform and a post extending at a non-orthogonal angle relative to the mounting block, the post including a distal end that is sized to be received in a passageway of a prosthetic femoral component, wherein the first carrier further includes a pair of walls connected to the post and extending outwardly from the mounting block, the walls being sized to be received in the intercondylar notch of the prosthetic femoral component, and
• a second carrier configured to be selectively positioned on the mounting platform in place of the first carrier, the second carrier including a first clamp plate and a second clamp plate that are moveable to grip a prosthetic tibial component between the first clamp plate and the second clamp plate.