Line lock or leave as is?

TrailBeast said

Nobody happened to mention the fact that if your brakes don't hold the car the line lock isn't going to help.
All it does is either locks front brakes on or block rear brakes off so you are only using the fronts with the pedal.
It won't make your brakes work better.

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I had the same concerns and I know you mentioned this on the original thread also
Brakes won’t ‘hold’
I may have misunderstood but I thought the consensus there was that my brakes seemed to be working fine for normal braking but not burnouts (which they aren’t designed to do anyway.) Admittedly I know very little about line locks but by locking the front only would that then free the rears to spin with no rear brakes applied? Again. I may be off base here.