Which temp sensor for HO 305 heads

[keh27]

I have a 69c10 with factory gauge and a AAW harness. 79 350 with ho 305 heads i want the factory gauge to work , AAW said use temp sensor (01513321) rock auto sent (12334869) ( superseded part number ) which I figuered before i ordered it would be wrong for my 305 heads, of course it was wrong and 3 times the diamater of the hole the 305 heads have. So my question is anyone have a part number for a sensor that work in my heads and make the gauge pretty close? thanks in advance,