I took measurements last night of the stock assembly and the measurements from the Tilton drawings. Results:
The VW assembly fits in a space roughly 9" deep, 9" wide and 9" tall. This includes the gas pedal.
The Tilton assembly is about 6" deep, 9" wide and 10.5" tall. No gas pedal. When you add the compact M/C's (23.8mm x 2 and 19mm x 1) the assembly ends up being about 9.25" deep, so no cutting of the firewall. The pedals will be about 1" taller.
The hydraulic clutch then operates like normal, M/C to slave .. just bolt it in and go.
As for the width of the assembly, I would have to move it to the left by 2 " to fit the stock beetle gas pedal. Does not look like a big deal but will investigate further tonight.
If you look at the drawings closer, you may be able to cut the assembly into seperate brake and clutch systems ... there is enough support and mounting studs so this would make the assembly narrower so maybe this is an option instead of moving the assembly to the left by 2"
Looks like this is the answer I'm looking for. I have to replumb the brake system anyways (30 yr old lines) so whats a little bit more work ...
Stay tuned !!
Sandeep