1968 GTS 340 with Carter AVS 4966S
Here is a trick a few of us do with the thermostats to let the air out of the block as you are filling it up with coolant with the thermostat in.
We take and drill a small 1/8" hole in it as an air bleed. Then you can pretty much pour in your 4 gallons of coolant without having to wait a long time for the air to burp out if it.
Some of the small blocks are real hard to get all of the air to burp out of them (and they overheat). This method you fill it up, then if you get close to 4 gallons in it you are good (probably 4 gallons with the heater core). Should be able to start it up, warm it up, let it cool down and the coolant shoud be at the same level as when you originally filled it.
Here is a trick a few of us do with the thermostats to let the air out of the block as you are filling it up with coolant with the thermostat in.
We take and drill a small 1/8" hole in it as an air bleed. Then you can pretty much pour in your 4 gallons of coolant without having to wait a long time for the air to burp out if it.
Some of the small blocks are real hard to get all of the air to burp out of them (and they overheat). This method you fill it up, then if you get close to 4 gallons in it you are good (probably 4 gallons with the heater core). Should be able to start it up, warm it up, let it cool down and the coolant shoud be at the same level as when you originally filled it.
