he did say STREET use,so i would have to think that the EDDY's would be more than enough for what he wants to do.
my dad just built a 499" with eddys that only flowed 297@600,we had to run small headers and a 850 because the big headers and dom. did come in in time and the motor still dynoed 614hp@5400 and 668tq@4400.
so,with a little preping,he should be ok.