This looks like a good swap from what you can see from the distance and the seller definitely has been on the forum given the mods he did would be my guess.
I didn't know Renntech does engine swaps so that is suspect but in either event let's assume the engine swap was done appropriately, I hope this goes up in price seeing what it is.

Just not sure if enough folks understand "what it is" lol. He could have also put it in the title, which would help his cause.