Hey there everyone! I just picked up my first datsun and it's a 521. I got it from a friend who has owned it for the last 30 years. He never did much with it except drive it. It seems to be a solid little truck that needs some "brighting" as I call it to be a great truck. Where my confusion comes in is the truck says it has a L16, the tag on the block says L16 but there are some inconsistencies. For one the serial number on the block is different the the engine bay tag. And again my friend never changed the motor. One of the major indicators is that the oil dipstick is on the drivers side next to the exhaust manifold. So I'm looking for some insight on what is actually going on here. Thanks for any help!