Thanks again for all the responses!
Last night I figured it out! I removed a fitting on the drivers side valve cover and used a pointed filling spout that screws on a standard quart size plastic oil bottle. It was a bit tedious squeezing in quarts and checking but I got it done and started the car for the first time in my ownership. That thing is a snotty firecracker! Its super cold up here in the suburbs of Seattle but I hope to drive it soon.
The dates on the tires (although they look new) are 2005ish, I will start shopping for something in a 200 treadwear range and replace them pretty soon just to have a fresh contact patch.
Thank you for your support, I really appreciate getting into the weeds on some of the responses and may pursue converting to a Dry sump oiling system and crank fired ignition down the road
I am very impressed with the build quality of this 550 and will be fiddling with it for quite a while!
BP in MV