Jack point round-up and question Options

[smj]

Let's review. There's this thread from the Bird Board featuring Dave Darling's oft-referenced jack point diagram.

Then there are notable threads here on the 'World:
Quick dumb question (2003)
Question about putting car up on jack stands (2007)
Jacking up (2009)

My question is a little different. In response to my thread about floor jacks I went and bought the 2 ton low profile steel model from Harbor Freight. (If I can fix the Sears jack, bonus.) Jack seems to work great, lots of nifty little features. However...

It's a long jack, because it'll lift almost 2 feet in the air. Which is interesting, because my driveway has ~24" tall concrete retaining walls on either side. To my best approximation I won't be able to fit the big new jack on both sides of the teener w/ enough room even to work the foot pedal and be perpendicular to the car. (Mayyybe. I will give it a try.)

That led to me trying to figure out what the consensus was on front and rear jack points. I saw something in all those threads about putting a 2x4 or 4x4 between the front A-arm mounts, then jacking from under the center of that. Sounds great, I've got penty of room to the front and back.

What about the rear? Using the middle of the 901 transmission gets mixed opinions. Would it be possible to use a similar 4x4 located under the two trailing arm pivot points, and jack that from the rear? I might be able to reach that. Is there a better option?

I do intend to take those stupid walls down eventually, but it requires moving a lot of soil and building new retaining structures. I'd rather be wrenching...

Thanks!