Watch the scat cast cranks, because the back flange could be machined too far back. I have heard from several different places about this and problems arising from it. AND: the crank in my 406 Crate wiped out the thrust bearing/flange because of this. You end up with insfficient "converter pull up" and when the engine runs and is warming up and things start to expand it binds up and the problems start. I belive the crank in this Crate motor is a scat cast crank.
Yeah I should have elaborated...that was the 4340 Scat crank. So far I've had zero problems with them.
