These are all front wheel drive and while any of them could be made to work, I don't think that's what you're looking for. What I'd be looking for would be a Mazda, Toyota, Nissan, Datsun pickup truck. One thing that has not been addressed in this thread is brakes. The A has mechanical brakes, so anything over 40 hp is gonna make a dicey driver.
If I were charged with doing this for you, I'd buy a complete donor pickup truck (maybe one that has been declared a total loss by a smack in the rear or side but not hurt in the drivetrain part of the truck). I would use every mechanical part from the donor. If it was electronic fuel injection, I would use every piece of wiring and the computer from it.
The A used a half-elliptical (I think that was the term) rear spring that could be re-used to hang the differential from, along with some brackets welded on to accept conventional tube-type hydraulic shocks (the stockers were friction shocks).
That would automatically give you upgraded brakes at the rear, commensurate with the power of the motor.
I would look to Master Power Brakes for the front brake solution. I would want to adapt the pickup brakes to the stock I-beam axle. These folks can make the bracketry for you to adapt the pickup rotor to the A spindle if you are unable to cobble it up yourself. Here are some helpful links from their site....
http://www.mpbrakes.com/technical-support/configurations.cfm
Of course, there will be a hundred details which must be addressed before you make your maiden voyage with your hybrid, so I'll link a couple of books that you may want to read....
http://www.amazon.com/Engine-Swappi...-Techniques-Shop/dp/1855200171/ref=sr_1_1?s=books&ie=UTF8&qid=1283219061&sr=1-1
http://www.amazon.com/Practical-Eng...ing-John-Thawley/dp/0936834110/ref=sr_1_2?s=books&ie=UTF8&qid=1283219119&sr=1-2
Swapping a turbocharger onto the motor for more power shouldn't be any big deal. I'm almost certain that there are kits available for those Japanese pickup truck motors.