I made a block out of 1/8" thick material 2 5/8" x 2 1/2" used it as a guide.You can use cardboard, heavy paper whatever it takes.
The picture gives you all the measurements in relation to the heater valve.

Tim

Last edited by bowtietim; 09/17/2017 2:26 AM.
1951 3100 Chevrolet
1951 Chevrolet Suburban Carryall
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