I am scratch building a modern dirt Late Model but no I don't have any experience scratch building other than that. I just got back into the hobby a couple months ago the the Late Model is my first build at all.
I saw a White truck from Revell on ebay but it was to expensive. I like the older trucks better and around here a couple of the small independent yards have old (40's-60's)single axle Cab overs used as yard trucks. So I wouldn't mind using one of those but the strange looking Ottawa's just make me smile so I would like to do something similar.
I would do any of the three but I like the second two the best. The local Mcdonalds distribution plant has two of the first one though, most modern. Honestly the red one looks like a death trap.