I have pretty close to your setup. 400/512 TF heads Solid FT 244*@50 .555 intake 252*@50 .563 exhaust with the LSA @ 112 with 10.3 comp M1 intake Thumper Carb 850. Next week were gonna fire it up and break the cam in on the run in stand. Had Don at FBO set me up vacuum advance dist. Not having the sheet in front of me. If I remember correctly. This is what he sent me. Initial 22* 34*total all in @ 3200 rpm 12* vacuum advance @ 10". Won't know how the vacuum advance curve works while doing cam break in. But if we get it on the dyno. Should be able to check it then.