1986F150Six Posted April 20, 2020 Share Posted April 20, 2020 Originally for Intermediate Duty trucks with low revving V8 engines., but work very well with 4.9L engines. The back cannot be seen, so ask the seller if there are 3 or 4 terminals? If there are only 3 terminals, it may be for V8 only. https://www.ebay.com/itm/NOS-1980-1996-FORD-F600-F700-F800-TRUCK-TACHOMETER-GAUGE-ASSEMBLY-F1HZ-17360-B/362972000491?epid=1943764946&hash=item5482d130eb:g:yeYAAOSwq4VemCT6 And, another source: https://www.rearcounter.com/F1HZ-17360-B-parts117906.html Link to comment Share on other sites More sharing options...
Gary Lewis Posted April 20, 2020 Share Posted April 20, 2020 Those are great for the 300 six - as you know. Good find! Link to comment Share on other sites More sharing options...
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