hey im a new guy here. I dont own a 620 but as i was looking trough my photo album i realized my dad had a 620 which looks like an extended cab and a dually. the engine was an edelbrock and was all polished and shiny. sorry for the lame descriptions but i dont remember exactly from when i was younger. but here it is..
it can be seen on the left side. its the only picture i could find of it as of now. we dont own the truck anymore and took it to our local Pick N' Pull junkyard and gave us $100 for it. 6 years later (now) i realize it could have been worth alot more.( i was 14 then)