How can you restore horse power in your old car?
By doing a full tuneup; changing sparks, wires, distributor
cap/rotor, changing the air filter, the oil, flushing the
transmission and the radiator. From there you should repair any
engine leaks, replace any old vacuum hose (all of the vacuum
hoses), and put a fuel system cleaner in your gas tank. I recommend
Gumout with Regane as a good cleaner.