Oky-dokey. If I'm getting the picture in my head right, I will put a breaker bar on the crankshaft bolt, keeping it from rotating off TDC for cylinder #1, then put another wrench on the bolt on the center of the sprocket which is now exposed because the vacuum pump is out (I assume this bolt is the IP drive shaft bolt you are referring to). Then, being careful to not let the crank turn at all, slowly turn the IP shaft CCW untill I have the needed slack back. I should be able to do this with the lower guide rail in place (I **r e a l l l y** don't want to go thru removing those darn pins again) - right?

After I get this all back together, I will read up on how to check the IP timing ;-)