It's tight in there, but with the column and firewall out, there is just enough room.
I got the seal from RockAuto. They list 3 different seals. One for manual steering. One for a 5/8" shaft and one for a 3/4" shaft. Mine is 5/8" (.625). When I started the order, they indicated 2 remaining. When I added 2 to the cart, they said only 1 remaining!!! I quickly ordered it. Less than $8.00 shipped.
There isn't much seal space to drill into, you have to be careful not to mar the shaft or drill into the boss on the outside of the seal.
