Originally Posted by
06malibu
Id look for vin numbers on the block. But non the less thats a pretty rare truck
it's a 5.4 block, it has 2 valve heads...
what I'd be worried about is it being a n/a motor (higher compression cast pistons VS lower compression forged pistons)
all in all it loks well put together, BUT I have no idea if the ECM was tuned via an aftermarket device OR a factory reflash