360 4-speed manual transmission?

360 4 speed in a car, one year only 1974. Special flywheel. The old Mopar performance modification book (Chassis Manual) had a 360 Flywheel blue print in it. I used a 340 flywheel ( zero balanced forged crank) and had a machinist drill (as indicated on the blue print) 3 holes to convert it to a 360 flywheel Cast crank external balanced). It worked perfect just as the book said it would!