The Mustang 5.0 got forged or hypereutectic pistons versus cast slugs in the truck but the compression ratio is the same, and it got a larger roller cam but otherwise the longblocks are identical.. same block, heads, crank, and rods. The Mustang also got a special intake manifold but it's actually quite a bit smaller than the truck version so I would not suggest bolting one on unless you're gonna leave the rest of the motor completely stock and just want a small boost in low rpm torque.