If that car wheels hops bad that will kill the parts quicker then the HP will !!!!!
As far as the trans and rear..... I have been doing this deal for over 20 years and it's anybodys guess what will break... I had a customer that used to bring me broken muncie parts. I would buy all the transmissions he broke. One time he switched to a Saginaw because he was broke. It came out of a junk yard.... I told him the transmission would not last the weekend... Funny thing is i still see that car driving around and i he has not brought me any broken muncies??????