Yea thats what I was thinking, now the question is which glow plugs work best in these engines?

Bosch duratherm are the best glow plugs available bar none.
Check rock auto out part # 80034

Yea I just looked at those a few minutes ago I'm definately ordering em when I get my paycheck

Could also be injectors leaking into cylinders overnight...if gp dnt fix problems id try new injectors. if injectors leak and problem isnt fixed could crack/ melt a piston..usually when you do fire it up and theyre bad theyll make a popping /ticking noise..hard to hear over the valvetrain noise though.

Injectors leaking overnight usually cause a LOT of smoke on startup.

I do have a LOT of smoke on startup, I know for a fact I need glow plugs but the injectors could possibly be leaking too after I change the glow plugs I'm gonna check all the injectors