This kit is used to dial in a misaligned register bore which could cause missed shift or premature pilot bearing failure. Two centerless ground dowel pins replace the stock pins and are extra long for use with block plates. The bellhousing dowel pin holes must be enlarged approximately 1/16 inch. Then the bellhousing can be bolted in position loosely. At this point the transmission register bore is checked with a dial indicator and moved in the proper direction by tapping the bellhousing with a mallet. After the bellhousing is positioned, the chamfered washers are placed over the dowel pins and welded to the bellhousing. Welding is required.