i am lookin to get heads for my car but im am kinda on a budget.. i was almost thinking of gettin the Gt40 heads or what ever they are off of a explorer im not even sure what years i can get those off of.. but i want to add a little more pep to my car.. so just throw me some suggestions thanks guys 

. they are windor heads off a 5.8. not sure exactly what car but they are off a 5.8 and they were $800 fully assembled with 1.7 cobra rockers