My LS swap 5.3 liter truck motor in my 70 EC had 150,000 miles on it when it went in and a little over 154,000 miles on it now. No oil usage, very good compression and 48 PSI oil pressure on hot oil at highway speeds, 30 PSI at idle. This engine ran well up til the moment of its crash inside the original 1999 GMC Sierra donor vehicle. I have had to replace a few engine sensors and fuel injectors and somebody had replaced the valve seals before I got the motor.
So pick a 5.3 liter motor out of a wrecked vehicle. I paid $800 for this engine already pulled out of the donor and I've been very happy with it. I have every expectation of it reaching 250,000 miles with no more than normal service.
Rick
So pick a 5.3 liter motor out of a wrecked vehicle. I paid $800 for this engine already pulled out of the donor and I've been very happy with it. I have every expectation of it reaching 250,000 miles with no more than normal service.
Rick
