The only intake for the 4.6 2V is the FRPP intake and its something like $1500 or something.
He could score a set of new/complete PI heads for around $570. They should add a firm 35HP and really help abouve 4000 rpm. If he wants to get serious about the head swap, there is a nice installation article on
www.tccoa.com that should cover most of what he needs.
He could always go for pulleys and a MAF. Tell him keep away from a TB as that won't do anything.
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2001 SVT Lightning (red): Many mods to come- Let the Vette killer begin to take shape
1997 Thunderbird 4.6L: Dynomax exhaust, Mustang intake tube, SVT Lightning 80mm MAF, Accufab MAF adapter, 7" Auto-physics powerstack filter, ram air, B&M 24,000GVW trans cooler, Custom chip, FMS 9mm wires, many more to come...
No Longer own: 91 LX 5.0L 5 spd