Are all 5.4 shortblocks treated equally? What i mean is a 5.4 out of a E150 Econoline Van the same as a 5.4 out of a F150 truck? What other cars/trucks/vans can we get the 5.4s out of at the junkyards and what should we be looking for? Is there an aluminum 5.4? Inquiring minds would love to know. Sorry for the incompetence.