This QuarterMaster bellhousing works with stock type throw-out arms or a hydraulic throw-out bearings. Works with either Ford or Chevy 10 1/2" or smaller clutches. Lightest housing available weighing only 16.9 lbs. Fits either SB Chevy or Ford (302/351W). Accepts either stock or aftermarket starters. Fits Chevy 153T or Ford 157T Flexplate