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Message: <blockquote data-quote="r3dn3ck" data-source="post: 251981" data-attributes="member: 9214">BBK tuned length shorty headers won't work. Steering shaft directly interferes. You can modify them but that'll be a world class PITA. FRPP and JBA shorties work out of the box. There will be longtubes produced pretty soon by a major manufacturer. I can't say any more on that.yes, high 12's on an automatic trans equipped vert with 87 octane are entirely doable. To dip any lower than high 12's you'll probably have to work a bit at your launch. The power is definitely there but, you will need a tune by someone that understands tuning big tq motors on autos to get there and you'll have to practice keeping the tire spin down. A lower stall converter may help... or setting lockup for like oh I dunno... idle. Auto's are not my bag but it's been done already. Realize that a more powerful car than mine did mid 14's because he used 3.73's and couldn't get any traction at all.With a 91/93 octane tune (same exact engine) call 12's a pretty well done deal if you can drive it. All 5.4 blocks (iron) are basically the same. If you are doing a 2v, start with a 2v donor motor. It'll save you big time cash. As for what year.. don't matter a damn bit. 03 blocks are heavier so I'd go with a 98-01 block, any crank if NA and aftermarket forged if going blower, use H-series bearings from Federal Mogul and Speed Pro so you don't end up with a bad tune costing you a teardown. Pop for the ARP head and main stud kits, they're worth the 300 bucks x 1000. For 2v PI heads you can use 4.6L pistons: flat tops is a hair over 11:1, -4.5cc dish is 10.5:1, -9cc-ish dish is 9.5:1. 18 and 21cc pistons for forced induction. Call your supplier and make sure. Forged are nice but Keith Black makes a nice HE cast piston for cheap. Check summit.TMD (The Mustang Depot) has H-beam forged rods w/ ARP 2000 bolts for 320 bucks. YOU NEED TO AT LEAST CONSIDER H/I-BEAM AFTERMARKET RODS FOR A PERFORMANCE APPLICATION. Most serious failures of the 5.4 include busted rods and windowed blocks.I learned those lessons the easy way, most others learn them the hard way. Choose your destiny wisely.</blockquote>