My small block puts out 1586hp at 25% overdriven,it is a 436 SBC in a 3200lb backhalf nova,it is getting a all aluminum 400SBC as we speak with the same components as the 436 and this one is gonna be faster,I will be able to turn this one 50%over on alcohol and not worry,I had a bigblock and it went to a new owner,it was a good boat anchor,Small blocks rule!!!!!!!!!!!!!!!!!!!!!!!!!