Well, as long as we don't have to show pichers, I hope you'll take my word that I have a bicycle-copter that enables me to fly like a bird at unfathomable speeds.

Haha--glad you like your Paramount, but this particular Peloton is a special bike to me. I still have my 57cm Peloton that I bought when I was a teenaged USCF junior, and could barely afford it because I was bagging groceries at Albertson's supermarket. (That was a miserable f-wording job.) It's far too small for me now, but after more than 3 years of searching, I just found a 63cm of the same year/model in beautiful shape on Ebay for only $120! But because I kept upgrading my Peloton with the latest 7400 index-shifting goodies, I don't really have the same desire you C&V types have for correctness. (God I love looking at that frame!)

If money is no object, why not have a frame builder make a steel combo bar/stem fitted for you? A cromoly steel handlebar will be less noodly than an untreated 6061 or 2041 aluminum bar.

What handlebar do you want to use? If it's 31.8 clamp dia, then your only option is going to be a threadless stem and an adaptor.
The connection between the stem adaptor and the steerer tube will probably have the same stiffness as a quill stem. The flexibility, or lack of stiffness, you perceive may have more to do with the handlebar and bar to stem connection.

Another valid question to as: is why do you require a 'stiffer' bar/stem? Are you competing? Or, do you truly like and want a threadless stem solely for the convenience of changing bars often, and aesthetics?

More posing than competing. I'm a larger guy (6'2", 178 lbs.) and I mislike being passed by the wiry, pony-express fellows when climbing Palomar. I'm no masher, but I love the way my Thomson stem feels when I do stand.

Part of it is admittedly aesthetics--quill stems may look elegant and classy to most, but to me they scream inefficiency--the shortest distance between two points is a straight line, no? And I further confess I'm a silly, vain creature who likes the idea of a white stem & bars on the front of that sexy frame. And both the Ritchey & FSA white stems have a little red accent, just like my Peloton:


But if there is a quill stem out there that is stiffer and lighter than modern threadless... well, familiarity is a magician that is cruel to beauty and kind to homeliness.

A wonder if a cromoly steel quill stem would be more stiff than an alloy stem? but what about your handlebar!? 31.8? carbon? aluminum? are you doign a fixed conversion?

Blasphemy!
(haha j/k, those in glass houses...) Thanks for the guidance, Orange, (and for the rando rack last year.)

Prying the rear dropouts to 130, adorning the whole frame with D/A 7800 bits, and a stiffer, ergonomic handlebar in white if possible, like these:


My Felt is black-on-black everything, so I could have Spy-vs.-Spy parked next to each other in the living room.

Different strokes for different folks. I'm the opposite - I've ridden a few threadless bicycles (My F500 being one of them) and find myself wishing for a threaded setup when it comes time to raise the bars.

Re- spy vs spy- now THAT is an entirely reasonable reason.

I likey!

If you had a spare Shimano Sante or NOS white Suntour Superbe Pro group, it would be even more fun!

As a matter of fact, the Rando rack I bought from you last year is going on another white bike, which is going to be my triple-chainringed tourer/commuter/dog-conveyor which has many Sante components (if Cyclart ever gets around to it...)
I just got my horizontal drop-out spacer-screws from you today, Orange, grazzi!

I just realized the cause of the confusion & hurt feelings, I was asking for OPTIONS, not OPINIONS. I can see how people might've read that too quickly.

Hey, this isn't a bad idea. The folks at Waterford bikes (Richard Schwinn proprietor) do restorations on Paramounts and other bikes. Could be they could either make a new fork and match the paint or just deconstruct and reweld the current one with a threadless steerer. https://waterfordbikes.com/now/home.php?newstype=randrO