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?

[rjames]

I had issues with the tailpipe hitting the ramps I have so I built some ramps out of stacked 1x6 boards. They don't get the car as high off the ground as the ramps would, but high enough to change the oil. If I need the car up higher I'll use the jack stands.

When I jack up the car I use a short piece of 2x4 under the longs. That leaves the donut clear to get the jackstand under it.