Thermostat gasket leaking AGAIN!!!!

4spdragtop said
What size socket to take them out? 1/2"= 5/16 thread....9/16 socket=3/8 thread.
Not to be a dick, but you're working on a 50-60 year old car, get a plastic bolt gauge, they're like $5, if that. If they're open holes to the coolant, make sure to seal them with Permatex hi-temp thread sealant.

9/16, yea i will pick one up, probably needed of one for a while anyways, lol
the threads do not go all the way through to the coolant, that was another reason for asking bolt size was the length. i will match these up but was concerned about the bolts being to long?

65TerrorCuda said
Aluminum intake?

just a stock intake

thanks all