question about autometer tach gauge

i know that my trucks only a 4 cylinder but because i got 8 spark plugs does that meen i'm suppose to keep the wire on the back together like it was a v8 or do i chop it,anybody got a tach in there truck?

really nobody knows wow that sucks a fat one

thanks

yea use the four cyl. mode because the 4 extra plugs are just for a cleaner burn