LS3 block won't do 1000whp, sorry. You need 6 bolt heads to do that, trust me, I know the feeling. To do it right, you're talking 15k in the motor only, and then it needs to be Installed if cant do it yourself. Then, add 3k to the bill for incidentals, all in all you have a 20k+ motor for 1000whp... And you don't even have a power adder yet
