Make sure there is vacuum going into the passanger compartment. There should be a vacuum line from the intake manifold goung into the cab. GoodluckJoe
There are hoses, gaskets amd water pump which cause leaking. Check it out where the coolant is comming from.. The speed sensor is probablu bad.
This is a BIG job and beyond the back yard mechanic's knowhow and special tool inventory. Take it to a garage.
THEY ARE TO THE LEFT OF THE STEERING COLUMN AS IT ENTERS THE FIREWALL...THEY ARE COVERED BY A SQUARE BLACK COVER