Junkyard hunt?

Any Mustang, Crown vic, or Grand Marquis between 99-04 will have the PI heads you are looking for. I think the cams & intake might be different in the non Mustang motors though. If I worked in a junkyard I would look for a motor from a Lincoln with the 32V, or perhaps a 32V 5.4 Navigator motor. Or even a Expedition 5.4 sohc.

a transmission? keke j/k goodluck

99-04 mustangs have them,01 and up crown vics and related cars with 4.6 and you can also get them off f150s or expeditions with 4.6 or 5.4 unsure of the first year tho,i believe these were prob 2000 or 01 and up as well.the cams are also diff from 96-98 and 99-04.i have a set of 2002 gt heads with 35k on them i can sell you if your interested.deff huge improvement over non pi.had the entire motor in my 96 and it really woke it up.i already sold the cams from the heads but have the rest.let me know.emails blckstng96@go.com.
im selling because im building a stroker with stage 2 heads and cams.