I use to have similar problems, a rear mounted tach fixed it
no really,
#1 anyone who thought they had a faster car, quicky backs off when the see its a sticks. Even had vetts back off after flying up on me and seein it, makes them think twice about startin something.
And reg folks who would ride my butt in traffic stopped also. They could see me short shift per say not goin much over 2000rpm n cruisin at 1500. Some how people get the clue quick that Im not going anywhere quick n they hang back.
It works is all I can say.