53 gmc on s10 frame

[03svt4life]

I searched and searched couldnt find a clear answer, i have 53 gmc short bed i found 89 s10 single cab long bed, im wondering if i have to relocated the rear axle on leaf springs? ez chassis swap says yes and they include the plate to relocate it, but ad-engineering says no you dont need to the trucks rear wheels are too far forward from factory so the s10 frame works perfect. Just wondering what clear answer is? im looking at air ride kits made for s10 but i dont think they would work without modification if i had to relocate the axle 2 inches forward to relocate the wheel base