Re: emergency shoulder belt issue-should I give up?
The locking clip must always be on the latchplate side, within one inch of the latchplate (as close as possible without touching the latchplate).
Here's a great explanation of when and how to use a locking clip:
http://carseatsite.com/lockingclips.htm
This one is also good:
http://cpsafety.com/articles/lockincss.aspx
You mentioned that the seat will probably move higher up on the seat, but not at the belt path. That's okay; to check for a solid install, use one hand, grab near the belt path and give a few gentle tugs side-to-side and front-to-back. Don't go crazy with it and use all your force; even the best install will loosen up with abuse like that (and a properly-installed carseat will usually be loose after a crash, too).
A forward-facing seat that is not top-tethered (only installed with a seatbelt) and rear-facing seats
will have some movement the closer you get to the top of the seat shell. That's okay. :thumbsup:
That being said, you can install tether anchors in your Integra; I did it myself in a 1991 Honda, ordered the parts online for $10-$15. You only need a torque wrench, and it takes les than 15 minutes. Top-tethering any forward-facing seat increases the safety performance by reducing head excursion (the amount of space the child's head will fly forward in a crash).
Hopefully the locking clip primers will help figure out the install, but definitely post back if you have more questions. I'd also highly recommend finding a local certified Child Passenger Safety Technician. We give out lots of good advice around here
, but nothing compares to properly trained hands and eyes, possibly familiar with your seat/vehicle combo.
You can search for a Car-Seat.org CPST in your area
here.