Sun Tester EMT 1010-FA 267

[Chuckles]

Now here is a teaser!
I have the Sun Tester EMT 1010-FA 267, but there is a big but.... It uses a pick up on the wire from the HT coil to the distributor on conventional engines, to get comparison readings.

Question: Has any one used this type of tester on the big blocks 454 with the EHI Coil/distributor, OR is there an adaptor of some kind.

I do hope someone recognises the model involved.