Thank you!
Got my exhaust valves;
One had light lapping marks but that won't hurt anything.
Still waiting on my bore gauges so I did the old "wiggle" test;
Lot's of play, definitely needs guide inserts.
Same seller had NOS Motorcraft rotors in stock so i bought one of those as well;
It has been rather rainy lately so I moved on to stuff I can do indoors.
One of them is a replacement for the license plate lamp holder. Original design is not very good, I have a stack of these and all of them are broken in various ways. Since this will not be a visible part I can modify it to my liking. Also will be a nice excuse for me to practice 3D printing.
Not a simple part, this would of been a nightmare to draw in CAD and I am not terribly good at that to begin with.
To get around this I used a free photogrammetry app called Kiri engine. First I stuck the part on a plate and dusted it with corn starch (shiny surfaces are difficult for the software to handle). Using lots of light also helped.
After taking many pics from multiple angles while rotating the part I had this 3D model to work with;
This was then exported as .STL file and opened in Microsoft 3D builder;
Luckily this part is symmetric so I only needed half of it to be ok.
After some cleaning, scaling and modifying I had a printable part. No need to worry on getting all the bumps smoothed as the poor resolution on my 15€ second hand 3D printer will average those out.
Some scraps;
And the first working prototype;
Still needs little work but getting there. Biggest modifications thus far are separate spring loaded release clips and a rubber light bulb holder. Also pictured here is the often missing original 3mm thick foam rubber piece.
Proto was printed in PLA but the finished piece will need to be ABS for it to survive outdoors. I am not sure if my printer can handle that but I will get a spool of it and try, if not I will have a friend print one with his more capable machine.