[starvinartis]

Those are 4X4 manifolds, two wheel drive manifolds curve back about 45 degrees at the bottom because of engine sitting forward. Also looks like you have the 4X4 rear crossmember (oval hole visible), you need a trans crossmember from a two wheel drive it will have two 3/8 holes for the trans mount. I've heard of guys using a 73-74 crossmember for the trans. Someone asked if this is a Blazer frame or a shortbed truck frame, need to determine this as they are different lengths. Shortbed truck is 115" wheelbase, Blazer, 104"