calfroper_06

Seeind that im new to the motifying stage as well as my mustang here we go, i picked up a motor and tranny combo i couldnt pass up. A totally rebuild, reciepts in hand, 306 with 1500 miles on it, a borg warner tanny. HAs new flywheel king cobra clutch, ford racing harmonic balancer.all fora$1000 bucks. Dudebought it in a car and didnt want it.Any ways dontknow much the gt-40 heads but from what iv read the gt-40 had gt in a few spots as well as the 3 marks in the front. as my heads do and the the gt-40p had 4 i do believe. so i beleive there gt-40's anyways are these iron heads worth anything. Did they come factory or are they aftermarket. and can they make some power