Cost of setting timing, on a V8 ??

150 will buy you a nice used advance timing light.

Today-service call. Drove to house,pulled cap and rotor to check distributor.replaced with known good ign module. All is good.
Fiddled with carb and timing,couldnt get rid of stumble.
Pulled carb, returned home to disassemble and clean carb.
Return to customers garage and replace carb. Runs like a top. 600 eddy,btw. Shoulda made a video.
$100 cash. Thats all i felt comfortable charging him.
If it was set timing and adjust carb?
Free...
Because i can.