I have a original 283 in my 65 Nova Sedan. Let me first start off saying my first restoration project car , so try not to give me to much of a hard time with this!!! Anyways, I've been looking all over the place for original specs when replacing certain mechanical parts. I notice all these aftermarket upgrades for with different lifts for cams, rings and pistons for certain bore sizes, etc. Does anybody know this information or can maybe point me in the right direction. I'm ready to start ordering parts so I can put this thing back together. Just need to know original specs any help will be greatly appreciated.