I’ve seen your first linked motor 300 bucks cheaper on Summit.
The 290 horse motor is a real pooch. Too much cam and no compression.
You’ve got a donor motor, why not get a bare block that’s machined already and use your crank and rods. Get new pistons and rebuild your heads. Get a slightly warmer cam too.
Bare block like this.
https://www.summitracing.com/parts/s...RoCbMkQAvD_BwE