I'm considering the replacement of the battery cables on my 91 F150 300 I6 E4OD 2WD standard cab long bed...they are all original (starting to dry rot and corrode).

I've seen some nice assembles that are OEM/NOS, and aftermarket/HD that are available.

This set on eBay: http://www.ebay.com/itm/191096589131?_trksid=p2055119.m1438.l2648&ssPageName=STRK%3AMEBIDX%3AIT is an aftermarket/HD set...but listed for V8 engines only. Would this work in the truck? Basically, I'm asking if anyone knows if the battery cables in a V8 same years are interchangeable with I6? (Any modifications I could do? I'm willing and capable.)

Also, I see that Ford Horizon has the following listed as the OEM Ford replacements:
FOTZ14301D - NEGATIVE CABLE F150; 4.9L F150 1980-91 - $26.10
E99Z14431A - POSITIVE CABLE RELAY TO STARTER; F150; 4.9L F150 1980-91 - $52.30
FOTZ14300C - POSITIVE CABLE BATTERY TO RELAY; F150; 4.9L F150 1980-91 - 12.86
91.26 + shipping($17 est.)

For about the same cost, wouldn't the HD cables be better in the long run? In the future I'll be adding some additional accessories that would tax the electrical system...such as trailer tow package / auxiliary cooling, ect, and updated audio system.

O'Reilly sells a OE replacement, but I prefer the lead battery terminals with soldered connections over the pop metal crimped ends.

The guys over at this site will make custom HD cables for about the same cost too...Battery cables for F150, Bronco, Mustang and other Ford applications

Just having a hard time comparing the applications since none other than the Ford site is listed for a vehicle with an I6.

Your thoughts?

EDIT:
Looking at Standard catalog (http://ecatalog.smpcorp.com/STD/#/vehicles) it seems there are some interchangeable pieces:
Ford Bronco (90-85)
Ford F-150 (91-88)
Ford F-250 (91-88)
Ford F-350 (91-88)

I'm still not sure about getting a kit not specific to my truck... seems I would need the block ground that may not come with the HD or custom versions above...although adding it would be easy, the length may be an issue though.
Seems that is correct?

 

Best thing to do is just to measure your stock ones and base that on your new ones. Maybe you can luck out on a set but I bought mine individually. With a length though you'll be in business. Remember to note with length has what ends,only 2 with the batt clamp on one end and the third an longest one will be just a flat ring terminal on both sides. Other than length, and type of end(whether it be standard top post, side post, or the flat end that fits on solenoids or the ground) battery cables are not engine or vehicle or manufacturer specific.
And see what their idea of "heavy duty" is. That's a loose term with most of these guys. 8ga is standard and nothing special. Anything lower than 8 is actually a thicker wire and heavier duty
I had issues with my bronco not starting after warm so I upgraded to like 4 or 2 gauge. And with my 78 I went with all Taylor Wire stainless braided ones.