Exhaust manifold pressure

[classicauto]

I've been wanting to setup a meter to read this, but I'm having trouble finding info on it.

First - I know you guys don't sell one specifically for this purpose, but I've thought perhaps if I used your premium peak/warn fuel pressure gauge, and installed the sender in the end of a long piece of brake line (flared steel line) attached to the manifold that the temp may be low enough for the sender to survive.

Any input on making that work?