Summit exhaust kit Hooker Competition recommendations

Hi all, hoping to get some reviews/experience with this kit.
I want to use it together with TTI 340 head pipes and oem hipo manifolds.
Reason for mixing 2 brands is simply cost.
Ordering complete from TTI isn't an option. Unreal shipping costs and budget.
Summit only offers "header back" systems. I'm going oem manifolds, so no direct bolt on from Summit.
How far off would connection to headpipe and "Hooker header hookup" on Summit kit?
I want as stock as.possible, no x or h. Straight duals. Current ex on car(67 cuda) is 2" and dual.
Thanks
https://www.summitracing.com/parts/sum-680144

TTI link
Exhaust_Parts