I'm trying to build a 54.4 mm stroke based version of the RG Gamma 500 square four engine, complete with modern 54 x 54.4 cylinders and accessories.

More precisely, what I am trying to do is a nearly-clone, Gamma adapted variant of an existing state-of-the-art 2T racing engine. There is a company that is helping , by allowing me clone the latest version of their engine.