For the front of the car, the frame rail behind the subcarriage. For the rear, the center hub where the suspension meets. These are just 1 set of points. See Autozone/advancedauto's website for pictures of other locations
yes
no. mine does not have power steering and it's a 1999 sl1
The speed sensor on a 1999 Saturn SL1 is under the transmission. It is below the fittings for the transmission cooler lines.
no
My son's 1999 Salvaged/total Saturn SL1 was rebuilt using many engine and body parts from 1995-1999 Saturn SL1 and SL2 cars, I believe it will work fine. I do not recommend before 1995 or 2000 or later models. I do not recommend SL2 either. I am not the expert but most of my son's engine is not 1999 SL1. Good luck!
.040
up a mountain
Near 12.8 gallons
throttle posistion sensor or vacuum leak
The starter for a 1999 Saturn is on top of the transmission under the air filter box. Remove the filter box for easy access.
175/70/14
It would, if you changed out the trans and the ecm/tcm. The SL2 SC2 transmissions have a different higher reving gear ratio.