a friend of mine picked up a freshly rebuilt 383. I went and checked it out for him yesterday and all he knows about it is it is a 350 cast block, internally balanced with a 400 crank and it has a 400 damper on front. we are confused on what flywheel needs to go on it. The guy that built it owned a machine shop and moved and does not know how to contct him. Any clue on the flywheel?