66C10 outer rocker to inner rocker gap at weatherstripping flange

[66C10LB]

Do any of the more experienced builders know if it matters if the gap between the inner rocker and the outer rocker weatherstripping flange is a smaller gap than the original? (I am new to building these trucks. btw). The original gap was about 1/2 inch but the new gap is about 1/4 inch. The Counterpart parts have quite a few minor differences when comparing to the original for example the weatherstripping flange on the original was very vertical while on the Counterpart it is on a slight angle (sloping about 25 degrees toward the inner rocker, so thinking that if it is an issue I could always bend the flange more vertical after welding if needed. (I will of course trial fit the door and front fender as well before welding the outer rocker.) Picture below of the rocker trial fitted to approximate gap.
(I have started a build thread as well with more pictures)