'97 4.3 vortec into a '94 non vortec truck

[94Cheyenne]

Not that I enjoy answering my own questions , maybe however a future "search" may help somebody out...... but it looks like the LB4 and L35 shortblock(cam specs however may be different) and interchangeable as they both use the same head gasket.

Yes, late lb4's came with a balance shaft early l35's were still tbi and if the l35 you have was tbi the manifolds are interchangeable. Same shortblock.
but the difference in the heads as vortec and non-vortec makes you choose your intake manifold.

My 94 is a lb4 tbi with non-vortec heads... but has vortec valve covers...