i don't think you would have to worry about the spindles, for a st car no way. if it sat to low put some spacers in the springs. the reason i didn't say anything about the installation is, that mustang was cut up so bad nothing on it was stock. far as i know though its like everybody said, it a bolt in. the reason i used a chev. 4 speed is we couldn't run a quickchange so the chev. trans. had the best ratio for the track i was running the exhaust might have to be worked with a little, but it shouldn't be a bad job.