are the high 10 low 11s a-body engines meek running 340 logs manifolds stock intake and carbs on 7 inch tires?
you dont need headers to be fast
ive had long tubes on my 1st 6 small block a bodys
last 2 68 70 340 logs
are they worth 800 on a mild small block nope
Do they help yes and mpg yes are they a pita 100%
can you run 10s 11s without headers yes