My 318, I used stock pistons,
# 302 heads, {Rebuilt at Napa machine shop}
Edelbrock LD4B intake
{Has small ports, this intake was made for the 318, not a 340}
Mopar performance cam,P4452759AB Duration 260/268, Lift .430/.450
Edelbrock # 1406 600cfm carb electric choke.
dual exhaust off...