Well the reason I would'nt go with hydro in my car is because of the price. At my local shop(which is the only place ive found one so far) they charge 950 for a b16 hydro tranny. For 700-1000(depending on the distributor) I can get a b16a1 swap. So that covers my head and tranny for a grand. Then I buy the hasport mounts for 500. The hydro tranny I have now came with the d15 in my hatch and yes your right b and d dont match.