when you mean it should be disassembled,do you mean i would have to rebuild,i dont know anything about the internals of a trans,just looking for something i can bolt up and go.plus,is this tranny over kill for me?i have a 1970 318 bored .030 with 360(587 castings)heads,.464 cam,stock lower end,i figure 300-325 horse at the most,and would be for street use only.one more thing,would this tranny fit the stock driveshaft with a 8.25 rear with 3.55 gears,with all stock kickdown,ect.?sorry,just want to make sure its what i need without getting over my head!