Headers VS Manifolds

Johnny - I hear what you are saying.....so When the 273 manifolds come back from the coater I will get my micrometer out and measure the head side port opening on both sets of manifolds. From a strictly visual inspection they appear to be the same size as the 340 manifolds when placed side by side. my point being if they are visually that close, whatever "choking" would be very minimal. Again this is not a race car, this car will never see a dragstrip. Maybe a lil street action but not significant enough to warrant spending an additional $1200 for parts and modifications. Someone will always have a faster car....I am not terribly worried about that.