Starting issues, long cranking cascadia.

Hey guys i drive a 15 cascadia evolution with a 10 speed eaton fuller. Ive been having long cranking issues to get started. My truck no longer starts on the first try, it always takes two times cranking and its a long crank at that.
After started at first it bucks and hickups very breifly maybe five to ten seconds.
***It only does this on cold starts**** say after several hours or long sitting periods.
****once its been started i can start it back up no problem...like say after a fuel stop or check in or whatever.
Im thinking its a fuel/ fuel pressure problem... the lines going into the head the seals around them seem to have a slight leak.
I also noticed some corrosion on battery terminal connections which i cleaned off and some at a connection under the hood on the firewall. The green corrosion.
Any help or ideas? Places to check...
My last and final thought is the clutch switch? I seen online that it can prevent truck starting when it goes bad....thanks.

 

Hey issue not solved yet. Also the bucking is more brief than i said. Actually once started if you rev it to 1000rpm or put it on idle then it bucks for a second or two. Going to see if i can get it in a TA

 

Update..at a TA and their solution is to change all the batteries so were gettimg that done but i dont think thats my problem but it does seem logical. We'll see how it pans out after the replacement.

 

Luckily this is a company truck and i dont pick up till later but i wanted to see what they could come up with. I could definitely do all those and would for sure if it were mine.

Oh and i know...once had a water pump replaced at ta and few days later the pulley came off...down for a week.
Then after being re-repaired the wire to the sensor on the coolant res. was left un secured on a hot pipe... i guess you hope for the best or look over work or have a list of mechanics you prefer....if i owned i would definently do what i can myself.