1) Does the new TFI say Motorcraft on it? I would try to find a new old stock part.
2) It would be a good idea to troubleshoot. The stator in the distributor msg be the issue. To replace it you’re going to have to pull the distributor, use a gear puller to pull the drive gear, reinstall the...
The Motorcraft ones have gotten expensive Motorcraft part number DY-425, Ford part number E43Z-12A397-A. Be sure to use heat sink compound on the back and tighten it securely to the distributor—the distributor is the heat sink to keep it cool.
I’ve owned my ‘85 2.8 since 1996, and I’ve gone...
https://www.ebay.com/itm/256016833004?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=DjbiHDp3RHm&sssrc=4429486&ssuid=d87u9en7TgW&var=&widget_ver=artemis&media=COPY
Buy this. It will be cheaper and better than anything being produced today.
Is this the seal you couldn’t find?
https://www.ebay.com/itm/232235924057?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=NzmmAuQ0QF-&sssrc=4429486&ssuid=d87u9en7TgW&var=&widget_ver=artemis&media=COPY
If there was only a way you could test for valves not closing all the way. Maybe like someone suggested after the low compression, a leak down test?
How did it run before you rebuilt the carburetor?
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