complete exhaust kit

[cwilson jr]

i have an 85 k10 with a 350 and an auto trans.  i need to re-do my entire exhaust and want to go with something better than stock and want true duals.  i found this and wanted to see if this would work?  i remember hearing something about a bracket getting in the way on these kits for the headers?  i don't care about brand and just basically want the cheapest mandrel dual kit i can get as i don't want to get crazy with stainless, etc.
i believe stock is what 2.25? and want to go around 2.5.  any feedback or ideas would be appreciated.  thanks.

  http://www.jegs.com/i/JEGS/555/30050K/10002/-1?parentProductId=872439

[cwilson jr]

i'm thinking one of the top two right now, but there is one diff.  and it looks like it may be on the headers' tubing diameter at 1.25 vs. 1.375.  anyone know why there would be a difference?  does this affect the flange?

http://www.summitracing.com/search/year/1985/make/CHEVROLET/model/K10/Department/Exhaust/Section/Exhaust-Systems-Kits/Part-Type/Headers-and-Exhaust-Systems/?Ns=Rank%7cAsc