I have to go with Hotrod and Max on this subject...
First, there is no such thing as a "good riding" T...They are light and the weight bias is wrong. They are usually loud and noisy, plus the wind will beat you up.
Second, don't try to mickey mouse this thing. There are decades of science that have gone into building these things...thats why they all look similar. If you go to a cruise and see one that doesn't have a cross spring and a dropped axle up front, look at the rest of the car..I guarantee that it will be cobbled up.
The last one that I built had a full on tube frame, a suicide perch with the steering tie rod ahead of the axle, a corvair reversed steering box and an 8" Ford rear mounted on two coil overs with hairpin style radius rods, and panhard rods on both ends. I ran a 31" tall 12" wide tire on the rear and 155X15's on the front...It was not a corner carver, but it was quick.
I had a metal body with a real working door...Really great for a guy who loves his pasta and Budweiser..I ran a 331 with a TH350 and a 3.50:1 rear...Mine weighed less than 1500 pounds, which is really light for a car with an iron engine and an automatic. California law states that all cars over 1500 pounds must have fenders, so I carried the weight certificate with me all of the time, but all I got from the law was thumbs up
I see body and frame combos for sale all of the time around here with suspension for 5 or 6 hundred dollars...some even have radiators and stuff like windshields.
If you are going to build a T, it would make so much more sense to buy the bones already engineered and go from there.
FWIW, California Custom Roadsters in Orange county sells plans for a T for about $20..It ain't rocket science, but these things have to be solid, or they are super dangerous...
If I can get my new high dollar Christmas present scanner to work, I'll post a pic of my T...
I just read your Manitoba special vehicle pages...Here is what I did in Calif where we have Special Construction Vehicle laws.
Special Construction looked alot like the Manitoba regs, so I went to DMV and tried to register it as a 1921 Ford. They had me take the car to the CHP for inspection, and they ended up approving it as a '21 Ford, so I didn't have to jump through all of the hoops about bumpers, fenders, turn signals, etc...
I suggest that you find someone in your area that has experience with real hot rods and find out what their take on this is b efore you spend a lot of time and money only to didcover that what you really have is garden art..

If you look at the pics of the two roadsters that you posted, you will notice that the bodies have different lines. The red one is a 1921-25 body, usually advertised as a 1923. The other one is an early body, usually advertised as a 1915. The later body has a bit more room, but many think that the earlier body with the big kick up in the rear is prettier.
Some fiberglass bodies have been made a scosch wider and 4" longer, which really adds to the comfort factor. It is an easy matter to make the frames longer which allows for a longer wheel base that takes some chop out of the ride..it also allows for an engine bigger than a small block.
FWIW, I have a friend who has a '15 with a Toyota V-6 in his and another friend with a Model B motor with a Crager overhead in his, and both are really quick. It doesn't take much to move 1600 pounds around !!!