All 34xx engines should be reasonably close in size to each other, the 3412 is just a 3408 with 4 more cylinders. Just like the detroits
nice, did they ever make a 3412 in a OTR truck????
I like 15overs however, it all depends on what you will be using the truck for as well.
So there was a guess what engine this is post on Facebook tonight and nobody has guessed this one yet. Any takers?