Have no idea on manifolds???

I have late 80's smog manifolds on my 360 magnum. The outlets are the same size as the dakota manifolds that were on the engine. I understand that they'll be more restrictive than the stock a-body 360 manifolds due to the internal design....but they're bigger than the 318 stockers and they cost me $40 at the local yard...so I'll deal with them for now. Driver side is rear dump, passenger side is center dump. Clearance is about 3/4 of an inch to the P/S box so I may have to do a heat shield or something, but the turbo j-pipe on the slant that was that close to the box without issues.