Have one in a 69 Coronet with 440 & 727. Have 2400 convertwer and 4:10 gears. Drove the Racine 2 yrs back for power tour and car is a blast. Had 3:23 before and not bad but car is so much more fun all around now. Would do it again. Lots of naysayers on here and there are other options but this was easy and used exsisting trans ect.