Swapping a Slant 6 for a V8

I was wanting to know what engines would be the best to put in my car, it is a 1974 Plymouth Duster 225 /6. I didn’t know if some engines would match the same mount pattern or not so I figured i’d Ask you all since you most likely know a lot more than me! Thanks! Also it’s more of a budget style build/ daily driver
I installed a 383 using Schumacher engine mounts. I’m still using my stock k member as well, At first I was going to do a 360 swap but figured if I’m going to spend the time and money I might as well do big block.