A 604 GM crate is a 400 hp engine. 305 Racesavers are 430-500 hp, depending on the quality of the engine and whose dyno was used to generate the numbers.

Personally I don't think we need yet another "budget" sprint class in Indiana. There's already the 305s for those of us who like wings (heresy on here, but we do exist), and the Steel Block series for non-wing cars. The 305s have the benefit of being eligible for IMCA national points and being able to travel if they choose. A 305 or a Wisconsin Wingless 604 car can also be run competitively with the Steel Blocks if they want to. I have a 305 because, for our budget, it gives us the most options to run when we can, which has been FAR too little the last couple years.