Next step is to remove the outdrive and gimbal. Then you can just reach through the hole in the transom.i cant help but think we are being trolled here. Knows enough to suck the oil out, but cannot find the oil filter on one of the most popular types of I/O out there. When given instructions on where it is, attempts to remove the exhaust manifold to access the filter..... last post cinches it..... righty tightly lefty loosy works for all "Chevy" based engines, Hell, IIRC the filter is the same one (or could be) between the v-6 and the 4 banger.....
if the Op isnt a troll, they need to just take it to a competent marine mechanic..... before they hurt themselves or others.