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**Desert Rat** · 05-30-2002, 01:05 AM

Id check to see if V8 tach,but a one ton dually could have real low gears,and big blocks done like to cruise at high rpms for long periods of times,plug in a aftermarket tach its simple to do to see if reads same,ive never had a factory tach that read the same,shouldnt be idling at 1200 i like mine at 800 in park,600 at the stoplight.Heres a thought drop off your tach here on the way to Pamona and ill give you a nice vac gauge cluster for it.

05-30-2002, 01:05 AM	#6
Desert Rat Senior Member Join Date: Dec 1999 Location: Darrington, Washington Posts: 3,963	Id check to see if V8 tach,but a one ton dually could have real low gears,and big blocks done like to cruise at high rpms for long periods of times,plug in a aftermarket tach its simple to do to see if reads same,ive never had a factory tach that read the same,shouldnt be idling at 1200 i like mine at 800 in park,600 at the stoplight.Heres a thought drop off your tach here on the way to Pamona and ill give you a nice vac gauge cluster for it.