Any experience with MABBCO engines?

A buddy's kid (college/part time job budget) is considering this shortblock for a Duster project. With a couple of exceptions, they seem to have a good online rep. Just wondering if anyone here has anything to add.

https://www.mabbcomotors.com/catalo...O_CORE_REQUIRED_-_90_Day_Limited_Warranty/191

I can't build him one this cheap, and the guy I talked to there seemed to KNOW what he was talking about. But man, $765 seems cheeeeeep. Too cheep?