[Roadsters] time estimate for removing windshield frame, dash pad and dash (early flat dash)

[Pete Peters]

Now I see why folks don't like to search the mailing list; you have to search each individual month (tedious), and the archives only go back to 2007. Anyways..... 

1966 1600 

Trying to confirm whether engine is actually overheating or if gauge is not working properly. I suspect the latter, and need to correct the "creative" PO wiring on water temp and gas gauges. Reaching up under and behind the dash a bit frustrating, so thinking I need to bite the bullet and remove the windshield frame (4 bolts & 2 nuts, right?), dash pad (4 nuts?), and dash (???). 

What's a reasonable time to accomplish this? Any gotchas? 

Thanks. 

Pete