Since it's in the car, perhaps the easiest way is to get the casting code off the engine. It will be located back by the distributor. There are several online sites that have the casting codes for a Pontiac engine.
1B7GL2AN3YS652865
the easiest way is to use the 8th character in VIN number to find out what engine it is. another way is look under the hood, usually they put stickers that will have your vin and the engine size i.e. 4.3
what size engine?
Different engine call for different plugs. You need to BClear as to what you have. Look under the hood for a white sticker, It will identify you engine size as well as the gap for the plugs. Or call a parts store.
To identify the size of a chain, you can measure the pitch, which is the distance between the centers of two consecutive links. This measurement will help determine the size of the chain.
define engine cc size 246cm
Engine size 2.3 IS in litres.
2.7 liters is the displacement (size) of the engine.
it has a 2.4li engine size for gasoline
6.0L
Take the VIN off the dash and call your Ford dealer; one of the characters will identify your engine size. Also under your hood the will be a ID number which should indentify the size. Serial numbers are ususally located on rear of block near the bell housing.......1930fcoupe