WAYBETTER

So my l20b is overheating. This is a new (used) l20b I just picked up from cali. Spent 3 days putting the motor in. My previous motor was an l18 and did the same exact thing. I have a 3 core radiator with electric fan mount between the rad and grill (always running). Not clutch Fan or fan shroud. Heater core bypassed. No thermostat. New temp sensor. Just driving it around the block for 45 seconds heats up to 3 quarters of the Guage. Both upper and lower hoses are very firm and very very hot. The tstat housing bypass is hooked up as well. Only thing I'm not sure of is that I'm running a W58 head with the non coolant flowing intake manifold but I don't think that would be the issue since my other motor didn't have coolant ports for the manifold on the head. Any ideas?