Your better off spending the extra 3-4k in turbo's or NOS and using stock heads with upgraded springs , which a guy can do himself with a 30 dollarvalve spring tool from Sears , the cam may be good for an extra 40 hp , maybe a touch better spooling ............................................................... 3-4 k in NOS or Turbo's is going to be good for an extra 300-400 hp , and spooling is taken care of far better than a cam by using compounds. If it was my $$ that's what i would do , take it for what its worth . Now if your building an all out comp truck then i would do both of the suggestions