Thanks, everyone! Such great suggestions!

Zoidberg & Annaleigh & Conanski & JWA'll deff get the inline filter and swap it along the rail since I've seen it on an F350 and I cant see why they wouldn't have it on an E250

I always use dielectric grease on TOP of the battery terminals after they've been installed along with NICKEL anti-seize on the threads unless specs strictly mention NOT to like some Nissan/Infiniti's
The torque specs on the 2011 E250 mentions 159 IN lb = 13FT LB (I usually use a 1/4 INCH torque wrench to get the IN lbs on engine rebuilds) since my 1/2 Torque wrenches are usually used on wheels etc at 80-200ft lbs)

I've noticed that the Motorcraft SP405 plugs on RockAuto are $3.14 each which are Platinum gapped 0.044" (which I always re-gap myself)
& The NGK 6579 goes for $7.82 each which are Double Platinum & NGKs are my normal goto for Japanese vehicles (also stated to use these on the E250 I've listed).

Are the Motorcraft ones that much better to go with even tho it's cheaper I don't mind paying extra to essentially never have to worry about these for the next 80-100K if I go NGK.

I've also noticed that newer 2018+ Fords are using Denso Ignition coils from the factory, I'm sure it would be fine if I used Denso coils now since it would essentially save me an additional $100 on all 8.

 

Ford had a problem with plugs blowing out of these motors because there weren't enough threads in the head at first, and then had a problem with the plugs breaking off because the steel threads seize in the aluminun head when they get left in there too long, so the plug was redesigned a couple times to get it right. You know what you're getting with the Motorcraft parts, are you as confident in aftermarket parts in this case?