Questions about replacing DD15 in my Cascadia.

Hey everyone here is my situation would appreciate anyones help and views I need help on this.

I have a 14 Cascadia 13 spd, engine had 800k when took it to a shop running with a check engine light for diagnostics. 3 weeks and 4k later they blew my motor it locked. Took them to court I got some money out of it

Question 1: I'm looking to buy a engine and put it in my truck but most engines I find are out of auto trucks. Will that work in my manual or not?

Question 2: I see people with 2018 engines in these years so I know it's doable. But will the emissions be compatible or will I have to get a 2018 emissions system or are those trucks just deleted. I wouldnt mind deleting but I'm in California I heard they are starting smog checks next year where they plug Intk your computer so I don't know if that's the smartest idea unless the delete can fool there scanner

Question 3: is it even worth it to swap the motor? I'm finding engines for 8-15k plus 5-6k to Install so looking at anywhere from 14-21k. Truck is paid off and in good shape alot if new parts. Or as cheap as trucks are now should I just get new one. I see 2016 Cascadia with 500k or less in the 25-30 range if not cheaper

Thanks

 

I just dmd you, I think lol I'm new to this