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Message: <blockquote data-quote="g36 monkey" data-source="post: 1376132" data-attributes="member: 10997">I didn't think there were any aftermarket heads?  I thought it was only  ported heads.  Either way studding is the real answer to the head gaskets and watching temps.To answer the OP, you would basically need to find someone parting out a Thunderbird Super Coupe.  As mentioned, it was a 3.8 based supercharged motor.  The super charger bolts right to the top and would probably net you somewhere in the 200 - 230 whp range in stock form.Short of doing that, as I have already told you a few times before, your cheapest option to pick up an extra 50 horse is the split port swap.A throttle body - nothingExhaust - long tubes will kill your bottom end, precisely where you need all your power, so essentially you would make the car slower.Cold air - will do nothing.If you look up how to do a head swap, and watch a few videos, the car would be down for a weekend maybe.  I have done a head swap in a day, but I know just starting out it would have probably taken me 2 or 3.  It's seriously just a bunch of bolts.  Don't let it scare you.</blockquote>