I have some comments:
We will make a many successes in the new Seven-Year Plan.->Did you mean by this something like "We'll thwart many a new 7-year Plan"? Because literally it is "We'll show some wonderwork to our 7-year Plan", and "success" requires "much" before it, unless it is something like "many success stories". And "a good (great) many" or "many a" are highly idiomatic expressions, and thus should be used carefully, as it may seem to be a bit away of the intended meaning. As a well-known proverb says, there's a many slip between the cup and the lip. :)
I love my boyfriend for kindness, happy speaking,->I love my boyfriend for kindness, for his jocular manner of speaking,
За походку и за глазки, и за то, что комбайнёр.->For his gait, for his eyes, for the fact he's a harvester driver.
грудь моя ядрёная->my lusty bust (it is closer to the slang meaning)
А я милая ничё, я влюбился горячо!->Oh, dear, nothing but that I've sparked to you!
I proud of it.-> I'm proud of it.
Как на нашем сельсовете красный флаг алеется,->The Red flag glows above our village council
Мы Америку догоним, сомневаться нечего,->We'll catch up America, no doubt,
Если партия сказала дело обеспечено!->If the party says so, it's in the bag! (it's an idiomatic translation)
Будем строить коммунизм новыми бригадами->We'll be building communism with new teams
pleace->please
Мы воронежские песни по-воронежски поём,->We sing Voronezh songs Voronezh-style
Кто ребят наших полюбит, всё равно мы отобьём!->If any other girls love our guys, we will retrieve them back!