I installed a mast motorsports ls7....705 chp in my 930...sold a couple of years ago! way more hp than you would need for the street. my car weighed 2200 pounds with a 930 four speed transaxle. my 71 911 has a dart aluminum block and heads and is 434 cubic inches with mass flo efi, etc. it also has a 930 four speed.the car weighs 2200 pounds. that is plenty of hp for my driving habits and quite simple setup.
