can't find the size of my block...the stamp to tell me what size it is. it is an 84 wolfburg with a carb and manifold. is this a 1.6 block? reason i'm asking is because i've got a nice 1.6 head, and if the studs break off...i'm just gonna switch heads. i've got an exhaust leak from the manifold and i have a few sets of headers lying around. are all the flanges the same for all the blocks??