A tooling system including a workstation assembly and a toolkit, is for performing an operation on a valve assembly. The workstation assembly includes a base platform; upright members extending generally vertically therefrom; an adjustable valve seat assembly coupled thereto for adjusting the height and alignment of the valve assembly being worked on; a stabilizing assembly for further aligning and securing the valve assembly; and a clamping assembly for engaging and securing the valve assembly once it is aligned, in order to permit the operation to be quickly and easily performed on the aligned, secured valve assembly. A method of use is also disclosed.