plenty of info here:
600rwhp Turbo ED Project
its an ED but there pretty similar anyway
fuel system will need:
bigger pump
at least 30Lp injectors (comp. will need retuning)
also if your goin twin turbo remember that costs can be a bit more than a big single
whatever u do, make sure u do a LOT of research and find out exactly what u need if ur doin this yourself or otherwise there will be problems, i dont wanna deter u from doin this but there a lot things that need to be considered.
cam- stock ones work well, although u could get WADE to grind one up
yeh try to take as little off the head as possible, a AU head gasket would work well. whats the comp. rario of the tickford, is it more than the stock falcon?
even still using "only" 5psi should be ok. just make sure its tuned well, which is the make or break (literally

) with most turbo cars