The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

bsask80 · 03-30-2018, 08:05 PM

Have a ‘64 K20 with a factory tach. Don’t know what engine was original. Has a 454 with hei ignition now. Tach needle moves but only goes from 0 to about 1500 rpm. What should I be checking ?

03-30-2018, 08:05 PM	#1
bsask80 Registered User Join Date: Nov 2009 Location: Coderre, SK. Canada( really close to nowhere) Posts: 86	‘64 K20 factory tach Have a ‘64 K20 with a factory tach. Don’t know what engine was original. Has a 454 with hei ignition now. Tach needle moves but only goes from 0 to about 1500 rpm. What should I be checking ?