Bellhousing

Major considerations:
You do not want a van/ pickup bell which uses a larger flywheel
You need to be careful some years are 3 speed or 4 speed only. A few bells have dual bolt patterns The center hole can be larger / smaller depending on what transmission, and that includes the overdriven A833
Earlier 273 bells only accept small clutches
The ball pivot mount for the Z bar and so on is different through the years, and you can get into a geometry nightmare to get the linkage "right"
Consider using a hydraulic clutch setup