Hmm...The Lightning is a 351....the lower won't fit. The GT-40 lower for the 5.0 ia about 250$ The heads will work good, but if it were me, I'd do it right the first time and go get some TFS, AFR's or Canfields....the TFS heads are by far the cheapest....and you will need a cam to make it work right.
Just my .02$
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Dustin
Saleenized 89 GT,428 rwhp,TFS Street Heat Intake,TFS TW Heads,TFS #2 cam,BD-11A 9 psi,FRPP 1.6 rr's,BBK 70mm TB,Pro-M 75mm Bullet,MSD 6BTM, FMS 9mm wires,BBK longtubes,BBK Short H-pipe,American Thunder cat back,3.55's
12.3@119
http://www.mustangworks.com/rides/pictures/Listing1549-slot1.jpg
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