So as I prepare to finish up my '88 Z31T ECU conversion on my '82 ZXT, I find that I would need to splice in resistors to make the original fuel injectors run at the right impedance. I figure the better long-term solution would be to just get the correct high impedance injectors, in a larger size to meet my horsepower goals.

So what I'm looking is an affordable and reputable place to get injectors from that are:
1. high impedance
2. hose feed type (instead of o-ring)
3. +/- 370cc

So far, the only place I can think of is RC Engineering, which runs about $88/each. I'm just wondering if there are any other reputable injectors for a better price.

Also, would the bigger injectors cause me to fail smog due to more fuel at all rpms, or would the Z31T's ECU compensate?

In my experience, Nissan ecu's can only compensate for a 10% +/- size in fuel injectors and be ok. Other than that you will be running way too rich. Whatever you do, avoid Venom injectors. Ask the Supra guys why they run from them like the plague.

http://www.rceng.com/

Make sure you pay the extra to have them flow matched.

I'm thinking about selling my 450cc injectors... they are low impedance tho.

Since the '88-89 Z31T ECU is supposedly "modern" enough to have a piggyback controller connected to it (per the Sticky), could such a device be used to rectify that?

Yeah, that's the place I already went to. But I'm wondering if there's any place else that sells quality injectors to meet my needs but at a cheaper price.