Remember, this is my take. I have tried a couple different chassis's out recently and these are my results.
 
 

Parma Excaliber brass chassis. It's listed as a replacement for Ninco classic's plastic chassis. Well this is not entirely true. The first issue it's too long for many, namely the Ferrari 166, Austin Healey's, and Porsche's. (it also won't work on the Testerossa without serious mods to the body, but that isn't the Parmas fault it's the 2 piece Ninco body design.) It will work on the Ninco Jag 120's.  Now on to how it's setup. Fairly narrow, and has a large rectangular opening in the center for a Ninco motor mount. Ie the 80605 for NC-1 motor, 80606 for NC-2, and 80607 for SCX type motor. It comes with 1/32 bronze bushings to slip on your REAR axle. Take your wheel/rims off, remove your bushings slip these bronze ones on and install. Easy job. Overall Assembly is fairly easy, most needed hardware is supplied plus using a "donor" cars pieces. There are posts, screws and plates for body mounting included. I'll be using my trusty balsa wood blocks however. I tried a nc-1 motor and axles from a Classic with the Ninco sprung guide. Chassis ran very smooth on my carrera track and the bare chassis very predictable slides. My overall feelings so far, on Short wheelbase cars the excaliber is no good. Standard cars, this is pretty nice fit and finish and can make it run nicely. There is even room to use a magnet. The Excalliber comes in a respectable second place. Cost, well not perfect, at roughly 17.00 for a brass plate and some hardware the rolling monogram style EJ's still has this one beat in my book. Unless you have motors, wheels axles and everything else laying about the EJ's adjustability and rolling cost are in my book the #1 replacement

EJ's monogram style chassis (ejshobbies.com) roughly $35 bucks can easily be assembled narrower than the others listed here and comes with everything to be a complete rolling chassis. The fit and finish are top notch, it runs great, very smooth/quite and needs almost no tweaking to run just about perfect with supplied parts. When you call to order Ed is SUPER helpfull and will talk to you as long as you like, he's great.   VERY fast shipping.  *First place awarded because of excellence in adjustability, cost, and performance. The chassis shown to the right has a Ninco NC-1 motor and mount to run right with my other NC-1 powered cars.

Protrack spyder sells for around $50 runs great and is smooth/quite no where as adjustable, can't narrow the rear enough to fit under many bodies sold as a roller, but not always in stock
 

TSRF Sells for around $47 on up no where near as adjustable as any of the above, will never fit under a NKOK chevelle GTO ect more for lemans, lmp type bodies parts are easily available, always stocked. It is easily the fastest chassis listed it's so fast on plastic track not many rtr's can hope to keep up, runs great on wood too.
 
 
 

Slot-it HRS not all parts can always be found at 1 place to make it a rolling chassis Cost roughly $17 for a bare chassis 5-12 for a motor, $5 to 6 a pair for some nice wheels, $3 for wheel inserts, axles 2 bucks each, $4 or 5 for a gear set. Does run very fast, smooth and fairly adjustable. I just found out, FantasyWorld sells a rolling version now. HRS on NKOK car bodies I used BWA wheels in the rear, scalex TA wheels up front and Scalex TA rubber all around. In all honesty the EJ's chassis would fit better and be cheaper than the HRS. I wish I had gone that route first. The HRS runs great, but after buying motor-axles wheels tires it adds up to more than the EJ's mono gram style chassis rtr. The EJ's can have a bar mag fitted if you like mags too. On the HRS the motor mount was glued in place and then the chassis was ground to narrow as you can see on the chevelle in the bottom shot The wheels shown on the rear are slot-it but BWA fit better for these bodies. For mounting I glued (shoogoo or goop) balsa 3/8th blocks to the body front and rear to screw the chassis to. If you click on the picture to the right it will enlarge and you can see 2 different cars with this chassis mounted.

.

Hawkwind101 What does the Platif Fox motor that comes with EJ's chassis compare to? The only information I can get is that it is 60% of a 16D motor which means nothing to me. Also what gearing ratio is on that (EJ's) chassis? Teeth numbers on gear and pinion?
William G EJ's gearing is 8-28 stock.
Robert Livingston Replied : Plafit Fox is faster than most of the original equipment motors in slot cars. It is approximately in the same performance bracket as a Prof Motor Hot Rod Pro, but is not as fast as a TSRF/JK Falcon/Plafit Cheetah motor. In Slot.it terms, I would guess it might be more like the 29k than the 25k motors. Bujt that is only a guess.

What I like to do to modify a chassis to my liking
 

EJ's chassis, I trim up front for a slot-it wood guide and  fasten a modified ninco nc-1 motor mount. The EJ's fits very nicely in a ninco classic, like the Austin Healey. Top of the bare EJ's chassis assembled  Bottom of the the bare EJ's chassis On the right is a EJ's chassis with Ed's new wide rear tires all mounted in a Eldon Coronet body

Parma Excalliber (supposed ninco clasic chassis) I trimmed/ground the chassis front for a ninco guide. This way it fits  much better with the guide closer to the front axle instead of being far forward. It (excaliber) does run very well, I am only disapointed because it is to long a wheelbase to fit the ninco classics.

Overall the parma excaliber is a fairly nice piece, however if you need to buy the rest, axles-gears-motor-guide-wheel-tires the best way is just go EJ's. Also, unless you want to cut and solder the wheelbase lengths are limited with the EXcaliber. The EXcaliber at it's longest fits a scalex camaro, and only gets maybe 7/16" shorter max without cutting and soldering.
The bottom of an excaliber can be seen here
See it mounted in a primer coated resin body. Bottom view mounted excalliber
chassis Side view mounted excalliber
chAssis Top view mounted excalliber chassis.
Rear view mounted

This is a 63 resin split window vette. Detail is awesome. I'm having a hard time making a windshield fit and actually look good though. It needs to curve too many ways at once. Chassis is a excaliber, rear wheels are protrack fronts are carrera vette w/ MRRC rubber. NC-1 motor 8-28 gearing
a larger pic
another larger picture

if you check out EJ's website and look under his specials www.ejshobbies.com you will see he also lists a bare chassis,
"1/32 scale 2gc5 Chassis kit $20
Our standard chassis without all the bells and whistles This Chassis fits most Vintage Revell, Monogram, and Eldon bodies. Perfect for Model Car Scratch building Fits the Fox motor, the Cheetah motor, the Rabbit motor, and the Falcon motor Club Discount: Buy 6 or more and get $2.00 off each."