Well played I say.
And I have no problem buying bone yard motors......as cores.
Even being sold as a runner , a quick glance doesn't scream " maintenance " to me. It says " rode hard and hung up wet ".
If the trans and rear , provided it was something decent , came with it then 575.00 is close.
I'd have tried to get the whole truck for that and scrapped what was left for the 100.00 or so that it should bring.