Completely possible just expensive. I build all kinds of custom engines. My Jalpa will turn 10k plus RPM and generate over 500 HP with 4 webers with only 3.9 liters. By the math it should be at 550.No it is not finished yet. The custom lifters alone cost me 4k, titanium valves, carillo rods and pistons, custom cams ported heads, etc , etc. 1000 Hp is pretty easy with modern tech you just have to go way up the rpm range and have pretty radical cam grinds, super good flowing heads and rods and pistons that can take the strain. The problem is to build a one off production car may not suit Lambo or their corporate objectives. Give me a blank check and I will damn sure build one. Lighten the chassis as much as humanly possible. Lower drag coefficients to bare minmums. Use an 8 liter motor. Turn 12 to 15 K RPM . Make 13 or 1400 HP and you will hit those numbers. You will spend lots of money on chassis and transmission. Engine power is not as difficult. Making it reliable and long lasting is another thing all together. Sounds like a fun project. Probably cost 4 or 5 million. (at least) Lee