X-heads enough for 408 stroker?

still make a 425 hp motor outa it but should get some rhs /indy x heads then u can turn it up they start where the old ported to max old x heads stopped dont stick a chit load of $ in them but it will make a nice motor yet, then when u can afford it thro down 2 k on some indy's built and u get your 500+ hp small block ready to bust a nut sell off the old 1ns for a dime or a quik 5 if nice yet and get some traction gear was the way i was headed but got detured only about a grand diff to start that way unless you can just buy the short block and bam thro it all together at 1nce otherwise a good start for the top end for now