dash brow fitment

I'd start by googling "Porsche 356 Dashboard" and go through the images for ones that accurately reflect your gauge placement. Looks like in most cases, with a three gauge setup, all gauges being of the same diameter, that the tips of the brow rest about 1/3 of the way down the sides of the two outer gauges.

Define what your dash looks like and somebody here will give you the right measurements. 

why isant there an early dash for these things,instead of the brow&blah dash???

As soon as I decipher your question, I'll try to come up with a barely understandable answer.

In the meantime, there was an "early dash" in the 356 - it had a tach (left) and a Speedo (right) with idiot lights in between.  Is THAT what you were looking for?

the one with the big square raised portion in the center, the early stuff. sorry you have an issue with my typing & grammer we all cant be Einstiens or rocket scintest that spell with spell check,Im just a everyday moron that does just about everything the other guys cant do& dont have a clue as to how to do them corectly or why,and fix it right after they screw it up or thier buddy the exspert screws it up. and then there is the "engines just blow up" guys that dont have a clue. if you dont understand any of my post dont wory,I wont either.usualy when somebody cany understand something it's above thier knolage anyway,grammer&spelling cant fix that. I strive to post something for most everybody....even the spellen/grammer police.

To the best of my knowledge, the early Coupe's came with the square raised portion in the center ( radio/speaker), with out Dash Eyebrow (Instrument Shade) refer to the picture.

The early Speedsters as Gordon mentioned it had a tach (left) and a Speedo (right) with lights in between or a small oil gauge with a Dash Eyebrow  (Instrument Shade) refer to picture.

Fitting a dash eyebrow is normally slanted to the on side this depends entirely on which dash covering you have.

I have found with my build the dash fascia determined where the bottom ends off the eyebrow is aligned. Most speedster the bottom ends lineup with the dash covering.

yes many the dash you show in the center. I would much rather have that one.now to find a pree a& pop a mold off of it.....ya like thats gonna happen.

Sorry cant help you with that, you could try reverse engineering with the use of photos and image measurement software. 

Here's my dash, CMC speedster.  The tach is larger than others. There are parts numbers on all three, when googled yield Porsche 914 parts.  Other equipment such as relays, switches, seats appear to be 914's also.

yup probably have to make one,I like the raido opening,it's kinda like they made it for a dvd gps unit.....he was a bit before his time with the electric motors on each wheel...possiably there too!!! Ill have to do some thinken on this issue.