yes and no...
all aspire suspension parts front and rear will bolt directly to the festiva body... however the parts are not the same so you have to change the entire structure over to aspire suspension.. the 2 cars share a few individual parts like axle beam and various nuts and bolt.
the aspire and festiva also have different wheel lug patterns so you need to have aspire wheels also and spare.... so if you change only the front or only the rear you will need to carry 2 spares.
no, two different suspension system specifications.
yes
No, they are different sizes, specs, and part numbers.
Yes, but removing the rear spindle is a lot of work and may require power tools or a press. A better alternative and a common modification for a Festiva is to swap the front hubs and rear end from an Aspire to a Festiva. This allows you much larger brakes, removable disc brakes up front, a rear torsion bar for much better handling. Some would say the swap is almost required as the Festiva stock brakes and suspension is horrible.
Ford did not make a festiva for sale in the us in 1997. They made and sold an Aspire auto trans or straight drive
I found wiring diagrams for the Festiva/Aspire at http://www.autozone.com/az/cds/en_us/0900823d/80/22/2c/81/0900823d80222c81/repairInfoPages.htm
One way might be to replace the Stabilizer Bars with ones from an Aspire. There are articles on the internet describing how to do it.
Ford Aspire control arms are the same from 1994 to 1997. The left part number is F4BZ-3079A, the right is F4BZ-3078A.
Ford Festiva was created in 1986.
One can purchase Ford Aspire Spider gears directly through the Ford dealership. These parts can also be purchased at auto part stores.
Cylinder Head Bolts for 1988-1997 Festiva and Aspire 1.3L I4 Engine Step one: 35-40 foot pounds Step two: 56-60 foot pounds
I think the Festiva manual transmission uses ATF The auto parts store or the owners manual will tell you