Another timing curve question

RustyRatRod said
"That cam" IMO, probably could benefit from the old drilled holes in the primary blades trick. If all else fails to help, you might try it.

I'm with Rusty in that you may need to leave the ignition alone for a bit and start working on the carb.

I'm 255 at .050 on 340 inches and my junk will idle at 750.

I think you need to spend some time cleaning up the idle circuit.

Did you mention what carb you have?