[geezer#99]

Is the carb working better?
Does it start right up like you want?

I’ve installed a torque strap a couple times to limit the motor from moving. Whenever put in gear the motor wants to torque to the passenger side.
I used a short chain with a turnbuckle. Attached to the frame and a convenient bolt down beside the power steering pump.
If the clunk goes away then you know something is hitting somewhere.
If you try that don’t leave the strap in place. Your steering can be effected.