V8 Tach conversion (second gen ranger)

[BowlEEac]

hey guys i have a 1990 ranger with a 302 in it. I have an aftermarket tach in it now but id like to hook the stock one up for more of a sleeper look.
Ive had the gauge cluster out and there is a pin on the back of the tach labelled "V8" which leads me to believe i can use it.
Ive done a bunch of reading and cant find anything definitive for the early second gen tachs. I know the later trucks can swap a wire to re calibrate the tach, could i do the same thing and does anybody know which wire?
Help would be good, thanks!

 

[85_Ranger4x4]

Baddad457 did that on his '89. Search around, he has a write up about it.

 

[BowlEEac]

I did and couldnt find much. I am pretty positive I dont have any adjustment screws for my tach. Even if I do I think I'll keep the aftermarket tach in it then. I would think that an aftermarket tach reading off a v8 as intended would be more accurate than a v6 tach "calibrated".

 

[85_Ranger4x4]

I dug this up, I hope it works for you:

http://www.therangerstation.com/forums/showthread.php?t=4680&highlight=tach

If you do it and it works I suggest taking pics and making a write up for the tech library.

 

[96Indyram]

I dug this up, I hope it works for you:

http://www.therangerstation.com/forums/showthread.php?t=4680&highlight=tach

If you do it and it works I suggest taking pics and making a write up for the tech library.

I wonder if that would work for my situation but going from 4 cyl to v6.
I might get a 88 ranger that had a 4 cyl in it, and the dash cluster is much nicer than mine and has a tach. My 87 is a 2.9 v6.