i personally like the 75-78 zcars over all of the them, once the bumpers disappear. stronger chassis, efi from the get go, all around stronger car, no need to reinforce chassis if v8ed, and if you wanted too, you could make it a full frame car from a little less than two feet of sheet metal. r200 stock with five speed stock, man i love it. some models have ac already, bonus. turbo swap into a 280 takes me a week taking my time, just drop em in, and wire up relays, ecu, and efi stuff, tapping into power thats already related, and boom, im in there. its my opinion only, but i do speak from experience, i had a v8 240z for quite some time and loved it to death, actually i drove it to death. downside of a 280, its not smog exempt, but i am