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Message: <blockquote data-quote="r3dn3ck" data-source="post: 256633" data-attributes="member: 9214">Whether or not you can believe it, the fact remains. The hardest part is hooking up the power. Don't kid yourself into thinking that it's easy to drive a car that piles torque on like these things.With cams and a decent intake you'll make the same peak numbers as you would with a blower on 8lbs through npi heads on stock cams. Even with NPI heads on the 5.4 I'm pretty sure you could trap solid 12's on motor with a 5.4. Adding cams to NPI heads isn't a huge loss either. Whatever you do, don't get caught up chasing dyno numbers. People get stressed out about making this much hp and that much tq. Make what you make, know why you're making what you make.Navi heads are really close to R heads. They have huge intake ports that suck on 4.6's but rock on 5.4's just like B heads. I like ported B heads better than any other but that's personal bias. They have monster port volume and flow pretty big either ported or not (port em'). Getting an intake to fit B-heads will be a little harder but Al Papito is going to be a good person to ask there. If nothing else, port a set of c heads and use some adapter plates or a kar-kraft setup.</blockquote>