How do you swap a Chevy 305ci 5.0l into your 1980 Malibu that had a 231ci 3.8l v6 cheap and easy.and where can you get cheap reliable performance parts?

There is no cheap and easy way to make this swap, aside from finding a donor car for parts. And why would you install a 305? If you are going to do it, install a 350. Way better and more powerful engine than the 305. If the 305 will fit then the 350 will fit. You can buy a brand new, (Not Rebuilt), 350 for less than $2,000 with a 3/36 warranty.