Did you have the head machined and magnafluxed to check for cracks? Are you using a nos head gasket or a new one. I have found on my 61 Ranchero the new gasket was thinner and with even the recomended torqe I couldn't stop my coolant leak. I also used a generous amount of antisease on each headbolt and been good so far. If you have to pull the head again be careful to not lay the head flat, the seam to warp easy.I don't recommend doubling the gasket unless you plan on getting a new auto an