Instead of changing the delimiters you can create files with your handlebars templates in without the .blade extension. Just include these files in your blade template. E.g
Blade Template File - template.blade.php
@extends('master.template')
@section('content')
@include('handlebars-templates/some-template-name')
@stop
some-template-name File - some-template-name.php
<script type="text/x-handlebars" data-template-name="content">
<div>
<label>Name:</label>
{{input type="text" value=name placeholder="Enter your name"}}
</div>
<div class="text">
<h1>My name is {{name}} and I want to learn Ember!</h1>
</div>
</script>