In my 1976 K10 which is used only on the street and sometimes for pulling a boat, I have the D44 and a 12 bolt rear. I plan to change the gear ratios to 4.10 and install a 4sp automatic for highway use. Would it be worth it to change the rear to a 14 bolt SF that already has a 4.10 ratio? There is one in my area from an 82 suburban 2wd for $300 but I don't know if there would be fitment issues. Also, can I get 6 lug axles for a 14 bolt SF or would it be more economical to do the front conversion to 8-lug?