Evening All

It's been a while, but I have been chevy-less for a while. But I'm back with a 40 chevy and as usual having trouble.
Can anyone point me in the right direction to ID my motor using the engine number?
The number is 08493 47F4Z, and it has four bolts holding the rocker box (valve cover, I guess!) down, not the two studs I expected.
Thanks in adavance
Taff