What to look for when buying an engine.

Ended up with the 2018 5.7 from a RAM 1500 but it will take a month or so before I receive it as it goes by sea freight. Will be interesting to see if I did a good or a bad deal on it...
Next step is to decide on the ECU, like I mentioned above, one option is to use the ECU from a crate kit, but as I understand the tune in it is for a challenger engine which is slightly different from a ram engine with regards to intake etc. So if the crate ECU has to be tuned anyway it makes less sense to go that way.
Also been looking at the MS3 gold box, looks like good option and well supported. The 318 in the car already has MS1 to controll a home breewed FI setup and it works ok.

For exhaust it seems like the best fit is to use TTI headers, but they are a bit costly and I really dont need long tube headers. Saw some aftermarket shorty headers for a challenger and they were stainless which is a big plus as the weather around here is wet and cold. Anyone tried going that route? Since they are stainless I could do adjustments to move the outlet without damaging any coating when welding.

Hopefully this will become more of a build thread soon...