Hi Waren:
Congrats on the PT. I see where you found the thread on the conversion I did - hopefully that will give you a couple ideas you can use. However YOU still have to post some pix!
* From Horizon's site it looks like the Power 32 is a 770kV motor, I think that is going to drive you to use 6 pitch (or higher) props. I'd say fit it with a APC 12x6 pusher prop at around 8800 RPM and you should be pretty close. The motor weighs 7 oz - putting it in the same general size class as the popular AXI 2826 series. I think the E-Flite motors are built very well and in this app should last near forever.
* The E-Flite ESC is a "simple" ESC, that does not govern like a Phoenix. The only problem I have with mine is that it has a throttle safety that prevents it from starting up at high (>50%?) throtle settings. I have to turn the RPM down to nothing and set ot every flight. Pain in the patootie! I do not know if you can "trick" the ESC with a low initial start-up on the Z-Tron. You will also have to throttle up over the course of the flight to keep your RPM's up as the battery wears down.
*4S x 3200 sounds like the right size pack too.
I also suggest you read the postings in the ARF section on the PT-19 ARF. The PT's tend to build tail heavy (your solight heavy compenets are a good idea) and you mujst take care to install the pushrod into the innermost or at least the iddle hole in the Bellcrank - NOT the othermost hole. I also thought mine semed a little "tippy" so I bent the LG forward and used 2.5" lite flite wheels for my grass field.