For New Readers Of This Thread: I want to let all of you new comers to this thread that the blower unit featured here is actually a 6v53 long bore and not a 4-53 short bore. Sorry for the misinformation. However, the information should prove useful to all 53 series Detroit Diesel blowers. Thanks, BadBlownMotor Hi guys. I just thought I would share this custom build of a 6v53 blower. I was originally going to put this on a SBC. I'm now thinking even more vintage. How about putting this on a 1955 291 Desoto Hemi? All parts are designed and machined by me.