C-Body Manifolds in Big Block Duster

saw a set of c body manifolds, have used the 67 bb manifolds,they have similarities but clearing the column on the c manifolds would defitely require some manifold fab as the originals on the 67 big block have a much sharper curve than the cs I seen, on a 383 or 400 its posible but on the 440 I think the work wouldnt be worth the effort, buy hooker sc fenderwells ,I gained 1.5 seconds over the restrictive 67 bb manifolds