Do I need a lost motion assembly?

I have a Honda civic 96. With a d16z6 block and had a y8 head before but have a z6 head thats gonna be going in. And I bought one with no LMA. (Lost motion assembly) so was kinda skeptical. Didn't really know if I really need it. Do I? What does it do with it? Can I ride with no LMA?
What will it stop if I don't have one.

Blown Head Gasket, Low mileage Car. Should I replace or fix?

I was driving my car yesterday and it started to shake violently. Then a lot of white smoke started coming out of the tail pipe to the point where I thought it was going to blind the cars behind me. Also, my car started to smell like antifreeze. I looked at the oil to see if there was water in it, but it looks normal. Anyways, my dad thinks I might have a blown head gasket.

I have a 1993 Honda Civic DX. I bought it used for around $2000 and it was working fine for about 3 years. It only has about 76,000 miles on it.

Is it worth fixing, because the car has fairly low mileage and I don't have to pay monthly car payments. However, my insurance company said that if I got in an accident (whether its my fault or not), they aren't going to cover my car. Or should I just get a newer car, possibly pay month car payments, and have my car covered my insurers if I get in an accident.

Does this sound like a faulty O2 sensor?

No check engine light, just wondering if my O2 sensors could be on their way out.

Rough idle, acceleration from idle is very poor. Idling has VERY bad bursts in warm weather, and the acceleration is twice as bad when it's warm outside (anything over 60 degrees F).

No vacuum leaks, throttle body is clean. I'm thinking of replacing both O2 sensors as preventative maintenance anyway but am curious if they could be my issue.

I know I don't have a CEL but I've heard O2s can definitely be faulty with no CEL.

Added (1). Car is a 2012 Honda Civic, 180k miles.

Fixing a crack in transmission case?

I have a 1994 automatic honda civic dx coupe a while back i got stuck up on a rock and cracked the transmission case directly on the bottom it's kind of more of a hole it's about the size of a dime. I had put some jb weld on it and it held for about 9 months but then decided to start leaking. I was wondering if anyone has had this problem before some tricks they did? ( I was told you can't weld my transmission bein as it is aluminum.(the transmission is stock) I was pricing them found one for a 380 but wanted to give something another shot before i pay that and than pay to have it installed. All ANSWERS GREATLY APPRECIATED (;

Hows the 2016 Honda Civic EX-L for a first car?

Hows the 2016 Honda Civic EX-L for a first car? - 1

Added (1). " No one needs a NEW car for their "first car", Just saying" Yeah, but why not? Its probably better to get a new one since a used one might be busted up.