Has anyone raced the 318 2 barrel engine in stock form? Looking at this engine in NHRA Stock class. Looking to get 300 HP, would put the car around .70 under in the N-O or P class depending on the weight of car. Just hitting the index needs 238 HP. As you know no mods to heads other than any valve job, stock lift cam, any duration, stock intake. Reason is I have at least 10 318s and two so so 340s. Any input would help. How do I change the header to racing tHe 318?