need help on build 440

You can do anything you want if you have the time, money and tools. If you're a little short on one or more of those then it gets harder. I did my first engine swap when I was 16 years old. I had a 1956 F-100 pickup truck and I bought a 351C engine out of a Mustang in a wrecking yard and figured out how to mount it into my truck. I had to ride my 10 speed bike into town so they could build brackets and mounts for me. It took me about a year but I got it running all by myself.

I recommend spending your first $200 at Amazon. Buy books on Mopar engines, on A body cars, etc. Once you read all the books you'll have a better chance of success.

By the way, if I had an original 340 Swinger I'd find a 340 for it. I wouldn't put a big block in it.