no
None.
Yes. The lug pattern is the same on all Astro vans up to 2001. 2002 they went to a six lug pattern.
1988 thru 1993 Saab 900 is the same as the Saab 9000 as they use the same brakes. 4-bolt, 108mm circle. They use lug bolts instead of lug nuts to secure the wheel to the hub.
Car and truck wheels will not interchange, Never have and never will.
NO
4x100
165.1
Yes they will. They will also fit all 8 lug fords until 1999
4x100
19 mm
12mm x 1.5
17 MM