I don’t think you’d get there without a different cam.
TF heads, head bolts, cam, lifters, rockers, pushrods....... about $3300.
And yes, you can get there with lesser heads....... that have been reworked....... but it won’t really change the price very much.
Well....... I take that back....... you can make the 550hp with something like an ootb Ede head(with a spring upgrade)...... if...... you can live with the big honkin not-street-friendly cam(and, it’ll also kill off a fair amount of low end TQ).
