idaho,

Just a chime in here in case you hadn't checked yet. Here is just a sample of many available "engine leak down tester" available (not mine nor can I vouch for if this one as a good value or not) at an inexpensive price should you decide to do the testing yourself:

https://www.amazon.com/Cylinder-Automotive-Pressure-Compression-Detector/dp/B09T38YCVL/

Perhaps others will come along and add their wisdom???

See below pics for my "old school engine tester" found amongst the boxes of spare parts and tools I got along with my Grandfather's '51 many years ago. wink

Dan
Attachments
The Hammett Motor Tester No 2 (box).jpg (52.83 KB, 187 downloads)
Old School Motor Tester (box)
The Hammett Motor Tester No 2 (components).jpg (55.97 KB, 188 downloads)
Old School Motor Tester (tool)
The Hammett Motor Tester No 2 (instructions).jpg (66.76 KB, 188 downloads)
Old School Motor Tester (instructions)

~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)