the 351w manifolds actually flow a bit more than the Hi-Po manifolds but not a ton, but when you're talking about stock cast iron manifolds any is better.
The drivers side for the 351w manifolds exit different depending on which year it is. I think 69 exits down and 70 exits straight back.... I can't remember which
The drivers side for the 351w manifolds exit different depending on which year it is. I think 69 exits down and 70 exits straight back.... I can't remember which
close, 69 and 70 both exit down but the 69 has a kickout at the end that points it outward, 70 doesn't have that. i have no idea why they did it that way either.
an intermediate pipe won't interchange between a 289 and a 351w manifold becauase the exits are so different.