I need help deciphering what kind of topmount this is! I'm not even sure if it is for a b or d series!!

 

theres no way of telling if you dont take a better picture of the actuall holes that bolt on to the head. btw all you have to do is go to a auto parts store and match up exhuast gaskets and if it lines up then you know which one is which.

 

thats actually the least of my concerns... I have both a d series and a b series motor I could just go out and check (but they are both over 30 miles away haha). I'm mainly wondering what brand it is

 

It isnt stainless from what I can see and most if not all the companies I know of make theirs out of stainless.Take a closer shot of the head flange

 

it might be 409 stainless.. and years old.... the flanges definetely look mild steel.

doesnt look like any design i recognize, might just be a cutsom manifold.

those rust spots on the collector look like spatter from an amatuer welding job so id imagine this is a one off from someone