I used 302 heads on my 318 with magnum manifolds and they fit perfect. The exhaust ports on the 302 heads fit very well with the magnum manifolds, no chance of leaks unless they are installed wrong. The only disadvantage with the 92/93 magnum manifolds is that don't fit as well clearance wise in A bodys compared to the 96/97/98 magnum manifolds at least on the passengers side. I don't think you can get one to fit on the driver's side without modifications. Treblig
