fabroman is telling fibs
hes always useing snow blowers in sydney
because u know australia is known for our record snow falls
so like fabroman iv never seen this machine
im making alot of assumptions based on what i can see in the sketchy vid
what if u mount the engine across the other side on the chute and run a shaft across to a pulley at the front
this pulley will hold a belt that threads though a tensioner and around the worm drive
(IMPORTANT BIT)
u must have a belt in the system
i imagine that these worms can get blocked
or u may hit a rope or garden hose thatll lock up the worm
if the worm locks up and the motor keeps spinning a chain wont give till the device rips its self apart
a belt will slip or snap resulting in an inconvenience but far less damage
this is the main reason belts are still used on machines today
i figure u will have to sit the engine back a bit so theres a uni on the end of the crank and a uni on the drive pully shaft
i assume thisll fit but without more pics i cant say for sure
thats my 5c worth