is it a 348 or 389 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigwin59 · 01-28-2015, 05:02 PM

With the new to us truck 1959 big window. The body is pretty straight nothing major. Still has 4 speed manual on the floor.

When I looked at the engine the valve covers say Pontiac M/T. The numbers on the block correspond to a early 60 Pontiac 389. Going through the specs on the truck GMC used Pontiac motors and possibly the 389 was downsized to a 348.
The motor has a freshly rebuilt appearance and sounds very healthy as if it has a healthy cam in it.

So how do i figure it out?

01-28-2015, 05:02 PM	#1
bigwin59 Registered User Join Date: Nov 2014 Location: SoCal Posts: 36	is it a 348 or 389 With the new to us truck 1959 big window. The body is pretty straight nothing major. Still has 4 speed manual on the floor. When I looked at the engine the valve covers say Pontiac M/T. The numbers on the block correspond to a early 60 Pontiac 389. Going through the specs on the truck GMC used Pontiac motors and possibly the 389 was downsized to a 348. The motor has a freshly rebuilt appearance and sounds very healthy as if it has a healthy cam in it. So how do i figure it out? Attached Images



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