Congrats, I've been working on my 1980 450SLC it's starting 2 come together. 560SL brakes have 4 piston calipers, but U need the rront hubs. Euro cams & a euro ecu helps. The suspension is easy 2 improve. Bilstien shocks, polygraphite bushings, 560 swaybars are bigger, even loweres springs & rear camber bushings if U want. A 380 sl limited slip rearend @ 3.27 helps & not sure, but a 722.6 tranny w/5 gears an overdrive might fit. There is much more. Hit me back if U want. Best of luck
Rev. buzz