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What he said.
Indeed the dashpad appears intact,tlc needed.The car appears to have been originally red judging from the overspray.
Record,pix,the id plate on the drivers door opening rear fringe,compare to stamped number on rh inner fender,note them.
The front fender tops are likely perforated and therefore the inner fenders too.
Remove the battery,poke the hellhole with a phillips screwdriver to punch through any thinned sheetmetal.
Before all that though,clean all the funky debris and dump it,you can't assess what you can't see.
A strong flashlight and a paint marker pen in red to circle and number every rust hole.
Carry a notepad to note each numbered hole.Inspect the glass for chips,clean them all inside and out.
Easy on the lid's topskins,fragile.Open the front lid and have a good look at the well under the fueltank.
Look hard under the fenders front and back,up and around,pix everthing.Determine if the car is equipped with a front antiroll bar.
The longitudinal stamped sheetmetal box section perimeter unibody fabrication is where the car gets it's strength.
At the rear it kicks up over the axles and swingarms and must be intact to be drivable,Perforations here is bad,at the front as well.
The drivers footwell panel must be replaced properly to carry the pedals,the water may have arrived there by perforations above.
The area at each lateral extremity of the cowl is a popular place for perforation,get an awl or screwdriver into the tiny gap and
try to push through the metal.Any holes there,the fenders must be separated from the inner fenders and cowl.
This car has to have it done regardless.Treat all rubber as irreplacable and handle gently,pix everything.
Remove the targa delicately and inspect the latch seats for cracks in the grp.The stippled finish on the top is usually uv baked and deteriorated.
Inspect the underside of the lids and doors for perforations,handle the rubbers with care.
A convenient area for water to collect and destroy is the lid's topskins foldovers.
Once you get it up on the hoist have a look at the bottom of everything.
Determine if the front swingarm isolastic bushings are buggered,they must be centralized in the outer tube.
Likely the rear bushings must be replaced as a matter of course.
Inspect the brakelines for damage and splitting on the flexlines.
This is a good point to tally the repair bill to determine the expenditure ahead.
Enumerate every part and sheetmetal hole by number.
#002-Front flexhoses=hrs 2+1+1
http://www.pelicanparts.com/catalog/SuperC..._pg3.htm#item12=40.00
#001-Footwell hole=hrs 4+2+1
http://www.restoration-design.com/mm5/merc...tegory_Code=914=50.00
#003-930TX=hrs 6+2+4+3
http://www.ebay.com/itm/Porsche-911-930-Tr...n-/281450387977=4500.00
3/101 things to correct.
Use a calculator to determine how much you will spend.A spreadsheet is useful.
You may have to periodically update the numbers to reflect mission creep when you spot that V8 at the wreckers.
Approach the restoration as a potential 50K 914-6,a concise record of repairs in a cognizant format may seal the deal.
A silk purse from a sow's ear.
http://libraries.mit.edu/archives/exhibits/purse/A 914 calender would be handy for inspiration and to map the repair schedule.
An adventure begins,a long journey of learning and practice of skills to be enhanced as the exertion of thought hones talent.
Take the trouble to make a full inspection of a cherry 914 to see what it should look like.
You have to be strong,this is no small undertaking and requires stamina and fortitude.
Good luck.