For FORD 351c 460 BILLET PERFORMANCE RACING DISTRIBUTOR READY TO RUN BLUE CAP FORD 351C PRO BILLET READY TO RUN DISTRIBUTOR The distributor housing is precision CNC machined from 6061 Billet aluminum. This procedure produces a flawless, lightweight distributor housing that is accurate to within 0.001''. To accurately guide this shaft, uses a sealed ball bearing located at the top of the housing andat the bottom of the housing, an extra long sintered bushing his combination keeps the shaft spinning smooth and accurately through 10,000 rpm. The Pro Billet Ready to Run distributor is the perfect upgrade for outdated points distributors or bulky HEI's.