All of the chassis style, size, and configuration questions are going to be sanctioning body and class dependent; and vary wildly from one to the next.
For the uninitiated, Google image search till you find something you like visually and start digging into what kind of car it is, and what it isn't. Figure out the sanctioning body, and find their rulebook. Many are published online. If it is not a spec chassis, you should find min and max dimensions and constructions in the rules. Then start putting parts in your hands. You don't hafta jump into buying things if you just wander around a couple dozen swap meets to learn what is available, what works together, or can be made to do so with whatever skills and tools you possess. Carry a tape measure everywhere!
Also, do not overlook what it will take to make the finished product street legal in your locale. This is not always trivial and has killed many projects mid-stream.
I seem to be the one leading the running of dragging people kicking and screaming into dirt track racing on here.
If nothing else, contact andy nelson, he is in the center of dirt track and comes up some screaming deals by him.
In general, most modifies are offset while stock cars are not.
As Gumby said, Depends.
ctk339
Reader
6/5/20 9:16 a.m.
A lot of late model stock cars are offset also. Modifieds with huge tires are cool though, probably wouldn't be hard to fix the offset of the chassis
NASCAR and perimeter chassis aren't, but they do have some bias's towards turning right, different spindles and cambered rear some times. I was able to convert my car over using all the same parts though.
I paid $1400 for my chassis, end up with a little more than that into it at the end though
I know to avoid chassis labeled "metric" as it seems whatever sanctioning body it is, has the builder follow the GM G body chassis design.
I'm looking for something narrower, kind of between a metric and traditional ladder frame. Something just a wide enough width to fit a pre-50s shell on.
Well nascar tour modifieds have raced at lime rock and Watkins Glen so they can be setup for turning right aswell. Offset type late models have been used for road racing aswell it just requires more work then a perimeter chassis.
In reply to MotorsportsGordon :
For road courses they generally just shifted some weight around, ran wheels spacers on the left and lower offset right side wheels. If I was building a car like the first pic I'd look for a nascar mod. They are super low, narrow, and lend themselves well to being rebodied. DIRT cars are a bit tall though they tend to have less offset. I wouldn't bother with any of the stock stub style cars. They tend to be fairly wide and by the time you undo everything to make an old body fit you could have started from scratch with an S10 pickup and had something closer to what you want. The S10 is mostly a Metric clip that doesn't flare out like a G Body chassis.
NASCAR mod. Thanks Wally. I needed a vector as far as names. Actively looking now. 
They also are often listed as Tour Type modifieds. Troyer and LFR are two big builders to search for.
Dude, that's damn near perfect
We squared this up and put a 4age in it. Resulted in the coolest go cart for big kids ever. Making it turn both ways was actually easy as it was an older square chassis. Just changed one side of the rear end so it had equal length axles and changed around how the a arms mounted on one side. Then removed all the lead in the chassis to get the balance back. (Photo from my old shop back in the 90s).
The car was a lot of fun and more of a proof that it could be done as there was no class for it. The car was later put back to the way it was and sold.
OMG, this is 30 miles from me and I'm tempted...
It's probably complete junk....
IMCA modifieds have little offset to undo. People can offset the motor but only by 2 inches.
stroker said:
OMG, this is 30 miles from me and I'm tempted...
It's probably complete junk....
Looks like 1st gen GM F body front clip.
In reply to NOT A TA :
Looks like its already gone.
If you wanted to buy a complete car and rebody it with an older shell , it's not particularly expensive.
(1) Marketplace - 1976 Chevrolet Camaro | Facebook
Stock car cars and parts are cheap, there's an oval track racer on every other side road here in Michigan. The stuff they sell off used is plentiful. I've seen an ad for a complete Busch Series NASCAR , running , for under $14 K. A SpecMiata will run you more than that. To build something like the NASCarlo would take some cutting and welding to modify any of the chassis I've linked to create space for two seats, and the door bars might be too far left for an older 30s or 40s style body, but they're cheaper than starting from scratch.
NOT A TA said:
stroker said:
OMG, this is 30 miles from me and I'm tempted...
It's probably complete junk....
Looks like 1st gen GM F body front clip.
Most likely a second gen clip those are the go to stock front clip for these.
noddaz
UltraDork
2/26/21 6:23 p.m.
Farmdale Ohio, Harris combo chassis
chassis, $850
In reply to MotorsportsGordon :
The white frame in pic above has a 2nd gen F body sub (notice front steer). Can't tell if it's the 70-74 or 75-81 from the pics. The one that lotusseven7 had linked I commented on previously was a 1st gen with rear steer. The blue one looks like a cut off '68-72 era GM A body front.
