In preparation for a move to Sr. Living (we are qualified as I have outlived George) I find a cigar box with many heat riser parts inside. I can't promise that all the pieces fit 413s but there are 5 thermostat springs, anti-rattle, 3 counterweights, bushings and axle shafts and at least one internal blocker valve that is larger than some others. Take a chance? $50 delivered to you in the USA. I have photos of the parts but can't get them to the list server here. Email to
lwjett@xxxxxxxxx and I can send the pictures direct to you. Included are photos of how the parts look inside the exhaust manifold when correct