So my problem (for now, i'll have plenty more later) is with the exhaust manifold on my obd0 b16 swap. the swap was in some guys civic before he wrecked it. the exhaust manifold he gave me with the swap is the one with the O2 sensor near the cat, not the two in the manifold like the obd0 should be. I cant seem to find an old b16 manifold on ebay/craigslist/etc. stock or otherwise. how should i get this to all work out? i was thinking of trimming the heat shield on the manifold that i got and drilling/welding in two O2 bungs, but that's a lot of work, and i dont have the tools to drill a hole that large, or a welder for that matter. maybe buy a cheap aftermarket 4-2-1 and drill that? does anyone have an odb0 b16 exhaust manifold they'd be willing to sell me?