Silicone Thermostat Water Neck Housing Gasket attempt

YY1 said
I used one (Mr Gasket brand) in the chevy housing holes on a performer 318 intake (elongated the housing holes on the Mopar housing.).

Worked good.

Apparently Mr Gasket makes a Mopar one but I've never seen one.

MR. GASKET THERMOSTAT GASKET - MOLDED RUBBER ON ALUMINUM CARRIER
Fits 1955-2002 Chevrolet 262-400 Gen I Small Block and 1965-2000 Chevrolet 396-502 Big Block, 1979-1992 Mopar 318/360 LA Small Block and 1992-2003 Mopar 3.9L/5.2L/5.9L Magnum.

PART# 738G