I have a 1976 nova. Not original 350. I am atempting to put headers on the car and new exaust. The pasengerside. The manafold bold futherest to the back.There is not enough room to put a rachet on a socket after I put a socket on it. I can't get to it with a box wrench. Is there a special tool that i can get to get this bold out?  

Also looking for advice on the exaust I am puting on the car. It is Jegs part number 555-30550. If anyone has any advice i will be greatfull.  

you need to, very carefully, grind down the out side of the box end of the wrench so that it will fit in there.  it can be done.