Its very cool to get a reply on this thread cuz its a combo ive remembered and thought was a good idea for 20+ years. Any idea what kind of hp your car is making? Just curious Im obviously on an entirely different path but I would very much like to find another old z(I consider 70-74 my personal favorite) and restore it with a setup like you have. My 3800 s/c z project is gonna be an awesome insanely fast Gmachine but it wont be the same. One day Ill need to build my own purist/type nissan powered z. These cars are as much a part of me as the Buicks Ive also come to modify because Dad had them too. Ive had 455 skylark GS cars.... 67w a 430ci 400turbo, 69 with a later 455 smog motor(still torquey!) A 70 gs 455 cam intake headers holley....the list goes on and on. Ive always dreamed of a zcar with a Buick engine although im surprized it took so long and ended up a v6 s/c. One day the 6 will get old and I will put a 455 in it. This year Ill flog the 3800 with a 200 shot and see how long it lives!