the car is auto...ehh. i would recommend a transmission cooler as ur tranny is gonna hate u for tearing thru it gears quicker. switch to obd1, it isnt that big of a deal. i would run crome or neptune, crome would be more readily available as only liscensed dealers can aquire neptune like evans tuning in PA.
i agree on the turbo to, a t3 60trim would be perfect. a super 60 t3 would be even better. it would spool a lil bit later, but ur mid and top end would be a hell of a lot better.
i wouldnt go below 2.25 ever, and i think that 2.5 is ideal. dsm 450's work great, dsm bovs work great and sound nice. get a simple log manifold from rcautoworks (hes making my mani at the moment) u dont really need an egt or a wideband, but they are very nice to have. oil pressure gauge and boost gauge are prety much required unless ur that damn cheap. pick up some t-bolt clamps, u can get like 12 of them for 40 bux on ebay or lsdmotorsports, get silicon couplers from napa, its sold in foot sections and is used on semi trucks. a JRC 6in would work fine, but found a 6in on ebay for 90 bux shipped and it worked perfect and fit perfect. ssautocrap wastegates arent that bad actually. running925 ran one last summer and after blowing 3 motors, the wastegate never creeped or leaked, worked perfectly fine. tial wastegates go used on hondatech tho for 120-150 all day.
personally, i would try and gather parts to do a manual conversion. it really isnt that difficult from what i have read and running925 was able to do it and he said it wasnt bad at all. i wouldnt worry about forged stuff right away, get ur ducks in a row, then tackle a bigger project. cause by the time u put pistons and rods in a d16, u could have probably bought a b18b and turbo that and make more power and have a better base. im all for the sohc love but, to make big power with less effort, a b series is the way to go