Hey dont laugh at the D15 blocks I knew a guy that added 2 inches to the block (welded it on) and gave it a longer stroke ported and polished head all that good shit, he was pushin about 200hp from it and runnin 13's, but i think it cost him close to $8000, he was just seein how much he could get from the engine, me if i had 8000 id just do a type r swap, but now my car has a d15a6 and i think its like 95 or 100 hp, i use to keep up ,with the newer si's, till i started havin probs, just goes to show its what you do to the engine and how much you spend , as far as i know you will have to run some extra wiring, ex: vtec wire, etc. and did you know you can get a z6 motor for about 800 to 900 and swap maybe for about 200, or a b16a swap for about 2500 or so, well got to go see ya