Gen 1 Radiator Capacity?

[DeepPower]

The 3.0L cooling system of the Gen 1 SHO has a 3.9 gallon coolant capacity. Can anyone tell me what is the capacity of the radiator?

I'm trying to determine the difference between a quick drain and fill of the radiator vs. having the time to do a complete cooling system flush. Thanks!

 

[Irish Pride]

I've never used more than 2 gallons whenever I've done a flush.

 

[DeepPower]

I've never used more than 2 gallons whenever I've done a flush.

Maybe that's the capacity of the radiator, which means the block holds 1.9 gal?

 

[pjtoledo]

don't forget the remove the 2 plugs in the block. they are at the lowest part of the water jacket. 14mm I think.