Those of you that do the final assembly and installation of your own engines after a rebuild have probably read and used the article written by John T. Shepherd of Arlington, Virginia. This article was written for the Restorer, January/February 1984, pages 10-15. The article was reprinted in the How to Restore Your Model A, volume 4, pages 10-15. The information covered in the article is one of the most critical procedures for eliminating vibration in a Model A. Misalignment of the transmission can not only produce vibration, but will also cause your transmission to jump out of high gear while driving down the road. to read more click here Flywheel Housing Alignment Pt1