I had the carb and head rebuilt and then did all the work myself. On initial start up i ran it for about 15 minutes. I noticed a small puddle of fluid under the engine at the back, i looked around and didnt see where it was coming from. The second time i started it i drove it around the block and i realized water was just gushing out, the rear feeze plug on the head had fallen out......i have never heard of this or seen this before. I went to the machine shop and asked the guy who did it ad he said that there must have been some excessive water pressure to push it out. That sounded strange to me. It looks like im gonna have to take the whole thing down again to get the plug put back in, any ideas or solutions? There is very little space between the firewall and the head. I used a toyota head gasket when i put it back together....