Are the heat stove pipes the same for 70-72 350 & 455? What about 68 & 69? Im thinking the 350 and 455 are different just because of size of motor? Does 2bbl or 4bbl change things?

I have a 70 350 2 bbl cutlass with nice stove pipe and heat stove and Im wondering what if any other applications?

 

'68 &'69 heat stove pipes are held on with two screws at the manifold sheet metal. '68 is different than '69. Big block different than small block.