Well...

...it looks like I'll have another Civic shortly. *chuckles* A wagon no less, 84. :-)

Now to track down tranny parts...
Current plan: (since all the individual parts are interchangable and cheap as hell)

1st Gear	2nd Gear	3rd Gear	4th Gear	5th Gear	Final Drive
85 Civic SI	84-87 CRX HF	84-87 CRX HF	85 Civic SI	84-87 CRX HF	86-87 Civic SI	Source of Part
	~7:11	~8:11	~7:10	~7:11		Per-shift Gear Ratios
3.30	2.03	1.44	1.00	0.65	4.40	Gear Ratios
33.8	54.9	77.4	111.4	171.4		Speed @ 6000RPM
48.2	65.2	97.3	135.1	161.7		Stock Speed @ 6000RPM
143%	119%	126%	121%	94%		New Acceleration
70%	84%	80%	82%	106%		New Top Speed

The tranny would be approximately 6000rpm->4000rpm at the 2-3 and 3-4 shift (longer jump from 1st and into 5th, both intentional) and shifted down a fair bit from a stock Civic transmission (14.52 versus 10.1626 for the standard '84 transmission) so it'll accelerate MUCH better from a dead stop.

Edit And just as a side-note before people go "BUH? You'll go how fast?!?" at the top speeds I listed there, note that especially 5th gear is purely a 'cruising at 55-75 gear on flat ground' choice meant to really bump up highway MPG values. The stock engine won't have enough oomph to get up to those speeds at all. But I believe the stock transmission would be stuck in 2nd at best on the grapevine, while the 're-geared' one should still be able to handle 3rd on the grapevine. And my RPM's will be around 2000 at 55mph both before and after the conversion, so my long-distance MPG won't be affected negatively by this change, only my city MPG will take a slight penalty. Only thing left to do, start going over my Civic manuals to plan out where I'll put an oil cooler and temperature probe in since I learned how cheap such a system is.