I told you earlier if you get your Edelbrock heads and Victor340 intake ported you can easily make 550 with a stroker. That is if you get the right guy doing the porting work. Don’t mess around with a 2.02 valve. Jump up to a 2.055 intake valve. Years ago my stock W2 heads flowed 260cfm&.450 lift then fell on their face and went down rapidly.