Kev
I would say older type arms XKE are better and if you use Wilwood calipers the solid discs are fine. My solid rear's worked perfect w/o venting.
Gas tank = The 42g replica tank via Nick with straps as it is awesome. Looks the part and really set off ass end detail. Anything less is a sin....
Comp style Contemporary tank
Seats: Call ERA or try Brooklamds.. There was a KMS set here on the forum not too long ago.. Get good seats as it to makes a huge difference.
Steering parts = Jaguar as it will have correct fitment.
Detail parts = Nick again........
ccx floor mount brakes
CCX cars are great, keep us all posted........ pictures....