Hi, if it turns out to be that You ran the motor that hot to burn a piston the rebuilder should be able to tell , all Your other piston rings may sezed onto Your pistons , try to put some marvel mystery oil into all the pistons but most of the time you are going have to replace all the rings . With that much blowby every thing gas , air is going to blow out of the carb , also do a compression check before You start on the terdown . Pete
