Stock magnum 360 long block, cam and all. Dual plane intake, carter 750, thats all thats done to it. In an a body with a 28" tire and 4.10 gear. I have 1 5/8" hooker comps on it now and it runs good, but the headers are about shot. I have a set of tubular automotive 1 7/8 x 3.5" headers that I'd like to set-up and use. I know the combo is all sorts of wrong, but will it make that much of a noticeable different from the smaller tubes?

I eventually plan on doing a head and cam upgrade. Thanks.