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**chevmn** · 04-22-2022, 06:55 PM

Not sure about aftermarket tachs, but I have connected a few with factory tachs to mid 70's factory HEI, and no issue, and tachs work fine. I know some have reported they used a filter, but others say no issues.

04-22-2022, 06:55 PM	#7
chevmn Senior Member Join Date: Dec 2017 Location: Central MO Posts: 881	Re: Tachometer Filter For HEI ? Not sure about aftermarket tachs, but I have connected a few with factory tachs to mid 70's factory HEI, and no issue, and tachs work fine. I know some have reported they used a filter, but others say no issues.