Different year blocks had different dipstick boss locations. And I believe one year the dipstick only existed in the oil pan and did not have a hole in the block.
The dipstick through the block has a tube on the inside of the block, below the pan rail to guide that type of dipstick past the spinning crankshaft - and it interferes with the ali sump So it has to be removed to fit that nice shinny ali sump you have - which someone has removed the outside dipstick tube from ..... So you need to find the tube AND correct dip stick before you can use that nice polished alloy sump. I have a similar problem - need the dip stick too! As Bob says - they are hard to findmarkandson said:Seems to me the best thing to do would be to plug the hole in the pan and just use the existing dipstick location in the block. Anyway here is the pic of the dipstick location.
A search turned up a thread I posted to a while ago:markandson said:Well here is a question that I am sure will be hard or impossible to answer.
Does anyone have a picture and/or dimensions for the pickup tube for the ali pan? I have a tube that came out of the 2.2 that I can modify. I guess I could also use the spare 1.9 block that I have which only has the crank in it and figure out what it has to look like in order to make one. The other thing that I could use would be a pic and/or dimensions of the dip stick tube and the dipstick that I need for this pan. Based on this thread it sounds like a long shot for both questions.