I did a similar project to Don Plumley's.

Less than $20 and quite a bit easier.

Bought the same center vent that Kuehl uses on ebay for $9. (Theirs w/ the duct is $140). It had some chrome paint on it that came off with a pick eraser.

For a duct I used (free if you eat salad and like Paul Neuman) a "Newman's Own" plastic salad dressing bottle. Empty. Remove label. Wash.

Cut off the top inch or so (fits perfectly over the bowtie hole), and the bottom half inch (fits perfectly over the back of the aforementioned vent).

Paint the outside of the bottle satin black (Rust-oleum)

Slide the bottle over the bowtie hole, and the back of the vent. Put a small dab of silicone sealant on the bottom of the vent and rest it on the top of the console. Don't touch for 12 hours.

Adjustable, closeable center vent that puts out huge air.

Did you secure the vent to the dash or console? Pics?

Yes, with a dab of silicone sealant. Actually put a dab on the bowtie hole where the bottle end slides on, on the back of the vent where the bottle bottom slides on and on the bottom of the vent where it rests on the top of the console.

If you don't disturb it for 12 hours - overnight - it's actually very secure.

Does not interfere with or even touch the ashtray.

It's far enough toward the top edge of the console that you can direct the air almost anywhere.

I cannot find my pics that I posted a year or 2 ago. Sorry.

Am getting ready to do it again on my 'new' SC so I'll take some new pics.

So you're basically gluing the vent to the top of the console?

You get today's MacGuyver award! Bravo! SmileWavy

Yes, using silicone sealant that can be easily removed in the future, though.

Well I have the salad dressing, now I just the vent. (and all the other A/C parts)

Was it the under dash A/C vent made by vintage air?

http://cgi.ebay.com/ebaymotors/Air-Conditioning-Heater-Vent-Vintage-Air-Brand-Std_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1076Q7c39Q3a1 Q7c66Q3a2Q7c65Q3a12Q7c240Q3a1318QQ_trksidZp3286Q2e c0Q2em14QQhashZitem270264610215QQitemZ270264610215 QQtimeoutZ1218733269503