I am sure this has been asked before a hundred times. But what’s it cost to switch from a 727 to a turbo 400. I am building a 91 Dakota and have to start building a 904 or 727 for it. I would like to build a 904 for it but don’t even have a transmission etc yet. But I do have a small block 727 case and some left over red alto clutches. But reading about the turbo 400 I am intrested in hearing what the cost Diffrence would be.