That's a very risky approach.
I'd suggest you engage one soon and set out all you propose to undertake and get his response. They all seem to have their own idiosyncrasies and you are best to know what they are
Mine wants door intrusion bars and a high mounted stop-light, neither are required on a 1972 car, BUT, he is allowing a whole range of modifications which others may question. I've contacted him on numerous occasion (in writing - email) to seek his determination on this and that. He dropped by to see the car finish welded on the rotisserie and he was pleased with what had been done. I know when I finally submit the car it will only be a matter of workmanship that he will review,
You shouldn't have to pay all the fees upfront, I didn't.
Oh, nearly forgot. By engaging sooner rather than later they end up giving you free consulting advice, not simply the approval. When you set out before them what you propose to do they can sometimes offer alternatives, based on their experience, which can save you time and money..
This statement is so true !!!...
Choice of engineer is crucial, some of them forget who they are working for. My 280ZX V6 engine and gearbox conversion was pretty well completed by the time one was engaged, presentation is all important as is the quality of work of course.
And this one as well..
I see what you mean I contacted a fair few already to get there vibe on the situation and its bit of a hit and miss for the gents ( so far ) over here. I have found one that's quite reasonable with only requiring emissions gear like charcoal canisters from the newer engine to be installed, even thou the car wasn't installed with one, but he seams interested and willing to discuss further.
Still a few more that I haven't contacted yet but there starting to get quite distant from where I am located, this is somewhat a task in itself really :S.