Issues with a rebuilt 360

That carb could easily be diassembled, parts verified they’re in the correct location, and reassembled in less than 10 mins.

Most of those Demon carbs with 4 corner idle have the idle circuitry set up “square”.
Same size ifr and bleeds front and rear.
The only real difference in the metering block on the Speed Demon is the primary block has a PV provision.

The main body is reversed on the baseplate, and the bowls are on the “wrong” end(only matters for fuel lines).
You won’t know about the metering blocks until you pull the bowls off.

If it’s one of the later produced units, it will have the “idle eze” feature in the baseplate.

If there are no restrictors in the idle air bleed holes, but there is just a hole drilled into the main body, you’re probably going to have a hard time getting a decent idle out of it with the current cam until the air bleed sizing is reduced.
We used to sell those carbs...... they’re not very friendly at low speeds with “bigger” cams.

I got to where I just modified them for screw in air bleeds right off the bat.