[BlackedOut67shorty]

You need an electric kickdown switch for the turbo 400 trans, i think it installs somewhere around the gas pedal. Possible conversion u joints to mate the yoke for the 400 and shortening or needing a longer driveshaft. Cant honestly say cause there is so many variables when it comes to driveshaft lengths.With the 400 sbc what are you looking to get out of it, stock rebuild, mild performance or all out race? Eather way i dont see a rebuild coming out of it that possibly wouldnt be cheaper than getting a 350 crate engine.