You asking for a world of shit putting a 4th gen civic motor in a 6th gen.Converting the OBD,entire shifting system,not to mention the wiring between a 6th gen auto and a 4th gen stick is going to destroy your mind,also I believe you will come into some axles problems.Why,why,why?If you are going into it knowing it won't be on the road for a LONG time,and it is going to cost you probably three times as much as I assume you think you're saving by going with a cheaper 1st gen motor,then more power to you.