ah I see. so the bellhousing was limiting rearward travel. S2000 wouldn't be worth it since they don't handle the power well. Zf would be worth trying though. for someone else. thanks for the response. I love the idea of the kswap in a datsun. all the good straight six options are so ridiculous in price. out of curiosity, did you consider the ford 2.3 ecoboost?