Does anyone know when did the D-Series nor Roamer get the 4.5L and 5.5L V8 options?

Was there only a 4.1L I6 option at very first, and then planned to get V8 versions later on in the future?

 

They've been here since the start

 

Both in D-Series, Roamer, and even H-Series?
Oh, didn't know!!
Grand Marshal does not have an I6

 

You thought they only had i6s ? They wouldn't be true american cars without v8s

 

Oops I was wrong. Grand Marshal did NOT have an I6 lol (although it can be a mod for one and will never be planned to happen officially).

 

they did only start off with the 4.1 I6 and the 4.5 V8,
but IIRC, the 5.5 V8 was added alongside the D35 and extended cab, way back in version 0.5, in late 2015.