It is for my Dad's 54 Chevy truck. It has a 400 hp motor but we can not get the motor to run right with a carb. Every carb we have tried (Edelbrock, Holley, Q-Jet) has a major stumble off idle. I think that this type of EFI unit will really allow this motor to run well. Perfect air fuel mixture would be great. If he can afford it and he gets it on I will keep every one up to date.