Originally Posted by
costina
3333 denotes bore size most cossies are 2222.
hope that helps
ive a 200 block but only good for nikasil liners
Its a bore grade number took 20secs to find this on google.
' if its a later 4wd block it will have 200 cast into the side. A genuine cosworth block had grade 2 or 3 bores, look near the distributor hole there will be 4 numbers, these are the gradings of the 4 bores so they should all be a 2 or a 3. '