Ha Ha,Ive seen 18, 525 rwhp 408s with 205afrs so dont tell it wont work cause it will I dont want max effort 408 just street torque monster,believe me it will work just still undecided with cam.Ill worry about the old behind when it breaks,headers are fine as im looking for torque,ls1 naturally have hp.A big bore sucking on high velocity heads,on a big reserve plenum"ie fast90"=gobs of usable torque as its what makes u fast, if it doesnt work afr 225 or etp will get a call,dont forget tnt and direct port IM SETTING UP SHOULD BE FUN