Show us your home made tools

I must confess I didn't check out all 16 pages of this thread to see if these time savers are already featured:

Had to pull my Distributor recently, and knowing how picky it would be to reinstall it "close enough" to start the engine and get the timing correct, I cut a slot in an old Distributor cap and marked the exact rotor position at TDC. On start up, it was only out like half a degree.
20200328_130954.jpg

I also windowed an old valve cover for use when drill-priming the oil system. Keeps the oil in the engine, and not all over my headers (like the 1st time I did that).

20200325_131147.jpg