I have a 363 that spins to about 7000. When I was building the motor I had a chance to buy a 950 ultra hp for a screaming deal. I did some research and read good and bad things. Most people said it won't work on a small CI because the massive 1.600 Venturi. So I bought this carb thinking if it doesn't work, I will sell it and make a profit. Here is what I found, this thing signals great! I even have to jet it down because it runs like a pig with the stock 92 jets in it. Put the afr gauge on it and it reads 10.5 to 11.50 cruising and getting on it. To sum it up, this carb is awesome!