I had a '69 Super Bee 4 speed car that I put a 440 in with the "purple shaft" .509" lift/292 duration cam and .030" over 12.5 to 1 TRW dome top pistons......you could get 101 octane at the pump at that time and it still wasn't enough. it didn't make a lot of vacuum for the power brakes but BOY, it went like a raped ape!