build the block and get a stand alone, if they problem is leaning out then maybe you need to spend the extra money on getting everything ok on the inside so you can do whatever you want to it... just my 2 cents, insurance and parts are a BIATCH! but hey its a skyline and i <3 them too... every guy wants one... but seriously... i love you car and thats saying alot since i HATE all mustangs... build it the right way