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fbbbkeith · 03-07-2019, 02:49 PM

Just purchased 1970 GMC suburban. Currently in my shop with new four inch lift springs, new dana 60 axles with locker in rear. Typical suburban rust but runs great. Wondering about rpms on highway with 4.10 gears and 37" tires?

03-07-2019, 02:49 PM	#1
fbbbkeith Registered User Join Date: Feb 2019 Location: Ellington Posts: 3	New project Just purchased 1970 GMC suburban. Currently in my shop with new four inch lift springs, new dana 60 axles with locker in rear. Typical suburban rust but runs great. Wondering about rpms on highway with 4.10 gears and 37" tires?