How to prove ls2

[MONTEZ]

Originally Posted by shenk10

okay thanks, i might just take a magnet with me, I'm sure I could also check the serial number on it also

To see if it sticks to the block? You'll know if it's iron or aluminum just by looking at it. The iron ones get surface rust on them pretty fast. Even still, the block itself will look different from the cast iron to the cast aluminim. The iron will be a lot darker than the aluminum will be and will more than likely be painted wher as an aluminum one won't be, unless the PO painted it.