how to achieve 600 to 650 hp sb 408?

sbmmustang said
DO you have the flow sheet to the heads?What fuel are you gonna run?

yes i have a flow sheet on the heads im going to bring home tomorow its out in the garage then i am going to write the numbers down. the fuel is regular shell v-power 99 octane its a gas you can buy on every gas station in sweden from pump