that seems about right my diesel shop told me between 250-300 bucks with the tab kit seems fair i really dont have the time right now and i hate the thought of it falling out

Thas is why the jig method is not a good idea! If someone jiged this one it would most likely knocked the pin onto the gears. The tab and the seal is available at Cummins for a lot less than $50. 00. The front gasket will most likely be fine with a light bead of silicone.
Part # and 4 year old prices for a '97 5spd
Seal 3804899 ($28. 80)
Gasket 3918673 ($23. 05)
Tab 3958017 ($1. 00)
Will I need to purchase an additional bolt? Will the stock one be long enough when the tab is installed?