the t04e/b flange will look more like a square. the t3/t4 flange is noticeably more rectangular. i can’t tell from the pictures because of the weird angles.
i liked the bmc but for 180 i thought what the heck…seems pretty damn sturdy.and that what i to start with.some thing for the price of ss autocrome but not the quality of ss autoshit.
i say get the bmc. i have it on my car right now and have been betting the shit out it and it is still holding strong. that manifold looks ok but i prefer to go with something that has been proven to work like bmc. i have been running 14lbs of boost on the manifold and it is still holding up. GO BMC!!!
www.bmcrace.com, or you can go to homemadeturbo.com become a member and then look in the forsale forum, he has a thread that has been stickied and I think he sells them for less there to members of hmt. I know you can def. get it for under 200 bucks shipped which from what I have seen isnt half bad for a turbo mani. that is proven to work
EDIT:
Heres the link to the thread http://www.homemadeturbo.com/forum/index.php?topic=34894.0 not sure if it will work for non members or not, but you can get a mild steel log for a bseries for 135 or you can get the stainless steel log for 210
yeah i think the mild steel would rust unless you coat it with something, 10 bucks at the auto store for some header paint would fix that real quick, or you could go with the stainless and hve to trouble, your choice