Seal kit appears correct, judging by the applications listed. To be sure, ask the seller if it is the Bosch part # DGK-121, as v8volvo listed above. The mainshaft seal will be incorrect size, 19mm. For that you will need to get the 17mm seal separately. That one probably needs the IP on the bench for replacement, but stay tuned, we're going to give it a try in-car.
Shim the governor? I've never tried it; apparently it removes the rev-limit. Careful about runaway! But as long as you have the IP cover off, yes that is the time to shim the governor. Maybe after you cable up a remote fuel shutoff, like this:
http://www.dieseltruckresource.com/d...d.php?t=211283
Warning: There is at least one IP failure mode that can cause runaway that cannot be stopped by engaging the manual fuel shutoff.