Is there a simple way to get a 914 jacked up enough to change oil Options

[dlindzey]

I can't even find a shop willing to change my oil so I am going to have to crawl around on the floor for a while. I have all the parts and a creeper but get confused on where you can put a floor jack and where you should put a jack stand as seems like same point is best for both the jack and the stands.
I have located the 4 donuts at the corners of the cab/chasis juncture, they seem ok. I am tempted to just get two floor jacks and jack up the rear at the donuts and call it a day. Is it dangerous to use jacks for support rather than putting a jack stand under there somewhere?
Ramps won't work as exhaust tip hits the ramp.
How do most of you solve this issue?

[914043]

Is using the engine with a protective soft piece of wood or hearty rubber pad between the floor jack and the engine case at the drain point not acceptable. Always thought it a little risky but the only way I've found to get a six high enough to be able to pull the engine out from under the car.