i would say its a1967 going from your numbers.
the h70s were the old ones they use a walbro carb most of the time and i think its actually better that the tecumseh built carb.
.when they used the tecumseh built carb they were usually called an hmsk.
the h on your engine means horizontal crankshaft.
the hmsk on the newer ones means horizontal crankshaft medium construction (aluminum as opposed to hh for iron )snow king. Â
the year comes from the last number in the serial number and that only tells us its a 7 so we must use the model number to get the decade which should be the sixties which would be 1967.
engine should be an off white color with a metal gas tank.
if i am right and it does indeed have a walbro carb then be prepared to spend some bucks on the carb .the kits are about 3 times as much as the tecumseh ones.
later chris
craftsman 10/28 snowblower with tracks  husky 372xpg chainsaw  sachs dolmar bc212 bushsaw  mondo trimmer  monster tractor with trailer   cheep wheelbarro and couple shovels and a partridge in a pear treeÂ
 Knee,
