That is different also.. In this thread we are talking about 340 stockers.. not Big Blocks.. Big Block it is legal.. There are many people in Division 1 running 383s and 440s with the Edelbrock heads.. But you CAN NOT in small blocks.. We inquired about running them on our 340 stocker and NHRA said we couldn't do it and they had a reason for letting the big blocks run aluminum heads but they have not yet aloud the small blocks to..
On another note.. These stockers are getting less and less stock because NHRA is changing the rules cause of the people running these stock eliminator cars are asking for more ... Like this past year they made aluminum radiators legal.. More and more is going to be legal soon.. Right now there are a group of guys on classracer who are working on getting NHRA to legalize aftermarket strut rods as a safety concern.