The starter was one of the harder hurdles. I solved the problem by drilling the starter drive gear on the end the same size as a second drive shaft. Then I pressed it in and had it TIG welded. The whole assembly is mounted to the block using existing mounting points.
The flywheel was another. I took a fadanza LS1 flywheel (p/n c5-1260 it is a 168 f/w) had a machine shop turn a 1" aluminum doughnut the same size as the removable friction plate. I samwhiched this doughnut in between the f/w and the steel friction surface. It is fastened in place using 20 grade 8 1/8" fasteners and 6 grade five 5/16 bolts which were drilled and tapped to make it one piece.