Hello!

I'm new here, i live in Brazil and recently i have bought an Ford Galaxie LTD 71', that is equipped with an 292 engine.

I disassembled the heads and i'm doing some work on it as it has some problem with valves.

I've read some content about what head do i have, but the code found inside the valve cover, does not match with any code on ford Y block head sheet found on internet... so i don't know things like what's the original height (or chamber volume). As i've mensured, my chamber has 73cc. All i know about it, is the code "1E6" and more in the right another code "DOTU-6090-G"... I know that 6090 means head, and maybe the DOTU is the code of my head, but there's no information about it!

My question is: As the down side (block) looks good, i will not take it out for now, but as the heads are out and already done some work on it, i'm thinking about mill it a little to raise a little of compression ratio... As it's hard to find pieces of this engine and all about it is very expansive here, i'm not planning anything nasty, i will maintain the engine original, just a little raise of compression to get a better response and less combustible consumption.

So must i mill it? if yes, how much? I'm afraid to mill it so much to reach some water or oil gallery... nor reach the minimum height of head as it can not take any cleanup mill at future... Someone has an idea of his original height?