I'd like to check for a vacuum, where do I start and I do I go about doing that.

I also went out to Kragen and got a couple of orings, since the one from the dealer won't arrive until Tue. The Kragen oring seemed a little larger and certainly a tight fit going into the tube. Drove it around the block a few times gunning it up to 4000 and I got a little black smoke behind me but no oil in the engine b/c the dipstick stayed in place. I'll report back when I get the eom oring on Tue.