This is a question that is better answered by the employees at an auto parts store, or your local Ford Parts Department.
On a 1993 Ford F-150 : Follow the top radiator hose from the radiator . Where it connects to the engine is the engine cooling thermostat
First thing is count the valve cover bolts. If it has 6 then it is a 302 or 351.The 351W has a taller deck height than the 302. (a 302 will have the intake almost flush with the base of the distributor... where it goes into the block..... a 351w will have about 1/2 inch lip there where the intake meets the block.) The lower thermostat housing bolt on the 302 will be below the top of the water pump and you won't be able to put a socket on it. On the 351W you can remove the bolt with a socket. 351C manifolds are dry, no water passages or thermostat housing....thermostat housing goes into the front of the block. 351w uses 18mm spark plugs and the 351c uses 14mm spark plugs. 351w fuel pump bolts are on left & right sides. 351c fuel pump bolts are on the top & bottom.
a complete donor truck
According to motorcraft.com : Motorcraft RT 1139 - 190 F / 88 C - thermostat Motorcraft RG 605 - thermostat gasket ( TWO REQUIRED - regular )
300-6 ,302-8 ,351w-8
According to one of the Ford websites : The 1993 Ford F-150 , with the 4.9 liter ( 300 cubic inch ) inline six cylinder has a ( 192 * Fahrenheit engine cooling thermostat )
The 1994 Ford F-150 with the 4.9 liter / 300 cubic inch inline six cylinder came from the factory with a ( 192 * F ) engine thermostat
its a V8 5.0
same as 302 if memorey serves I believe that on boss 302, 351w, and also 400, the fireing order is 1-3-7-2-6-5-4-8.
Hey man that might be a head gasket i wouldn't even drive it
on the opposite side of the oil dipstick only farther back if you have a 5.8L 351W
Yes, the injection system will not provide the correct mixture if the engine temp does not get to 150 degrees F