If it is the TPI Engine, the 350 is rated at 265hp at the flywheel. (many agree that this is an underrating by GM and its closer to 290)
Factory rating is 200 horsepower.
you have to drill out the rivets
That would be the 4L60E transmission.
The 1993 Chevrolet K 1500 pickup truck 02 sensor is on the back of the air cleaner housing. The O2 sensor should be labeled as such.
Sometimes you have to remove the pump to get to the fitting on the pump.
200hp
The lug pattern for a 1993 Chevrolet 1500 pickup truck is 6x5.5 inches (6x139.7mm). This means there are 6 lug nuts and the distance between each lug nut is 5.5 inches.
R-12 freon............
It sure will.
The fuel mileage, on a 1993 Chevrolet 1500 pickup truck, is stated as; 18 miles per gallon on the highway and 13 miles per gallon in the city. The mileage ratings vary according to the size of the tires and transmission.
No it will not interchange.
A downloadable wiring diagram, for the rear turn signal on your 1993 Chevrolet Cheyenne 1500 pickup truck, can be obtained from the manufacturer's website. Many auto-parts websites will also make the wiring diagram available.