Troy,
There are 2) 2" round tubes tying the rails under the engine. Yes, the engine is a stressed member as it mounts solidly to the frame rails at the upper control arm area. The front frame rails will not bend under cornering forces.
I don't recall exact roll center height or roll center change as I wasn't involved in that area of the design. The camber gain is about .75 degree/ inch. (standard coilovers have about 3.5" total travel.) Backspacing is dependent on a lot of things, like ride height, body style, etc. There are about 10 cars under construction with this chassis now so more info will become available. I'd guess about 5" backspace on a 9.5 wheel. Steering shaft: If you want everything out of the way 3 u-joints and one heim joint guide should be used. You may be able to get by with 2 joints depending on engine and steering column used.
We can position the rear links at whatever angle the customer wants or can add adjustment holes. It could be modified for a 3 link with watts or panhard.
There is plenty of clearance for a 3" exhaust to go over the axle with our standard rear suspension.
Exhaust ground clearance depends on how low you set up the car.
We'll use 3" oval pipe for this air ride equiped one.
Steering lock is same as stock. There's more than an inch of clearance to the sway bar link with 255 tires we had on for the shoot.
Radiator core support bolts to the chassis with out any interference of the front tube.
Bumper brackets will need to be fitted after the body is installed.
To quote Herb Adams "suspension design is a compomise that requires evaluation of all the factors". I'll also add there's personal preference on what an individual likes. I personally like some scrub radius as I like the way the car turns in to a corner.
We can custom build a chassis that is perfect to the specifications an individual wants, but it may be a bit more than $2395.
Thanks
Jeff
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