The problem I see is that the early (92/early 93) mag manis are ~2&5/16 outlets and are very nice pieces whereas the later ones are 1&7/8 which is the dia of one header pri tube on my last BB. yes they would fit (that is important!) and would be fine for a DD 318. the very best manifold combo is a 68-70 340 HP pass iron manifold and an early mag dr side manifold (what I have on the stock car).
I've heard this several times about the outlets being much smaller on the later year magnums. Any idea why they did this? And can the later ones be opened up to the large size or is the casting totally different?
